Membangun Aplikasi Java menggunakan Ecplise

<p><div style="text-align: justify;">Pada tulisan ini dibahas beberapa hal mendasar yang saya rasa penting diketahui dalam penggunaan Eclipse untuk membangun aplikasi Java. Beberapa hal yang dibahas adalah: pembuatan workspace, cara membuat project, cara membuat Java class, dan cara membuat package.</div><div style="text-align: justify;">Konsep abstraction, encapsulation, inheritance dan polymorphism yang telah dibahas pada Tutorial Object Oriented Programming dengan Java Bagian <a href="https://firmanhid.wordpress.com/2014/01/11/tutorial-object-oriented-programming-dengan-java-bagian-2/" target="_blank">2</a>, <a href="https://firmanhid.wordpress.com/2014/01/11/tutorial-object-oriented-programming-dengan-java-bagian-3/" target="_blank">3</a> dan <a href="https://firmanhid.wordpress.com/2014/01/11/tutorial-object-oriented-programming-dengan-java-bagian-4/" target="_blank">4</a> dapat diterapkan menggunakan Eclipse. Yang berbeda di sini hanyalah Integrated Development Environment (IDE) saja. Pada artikel-artikel tersebut IDE  yang digunakan adalah Netbeans.</div><h2 style="text-align: justify;"><strong>Java Development Kit</strong></h2><div style="text-align: justify;">Pastikan Java Development Kit (JDK) sudah terinstall pada komputer. Bila belum, install JDK terbaru pada komputer Anda. Pada contoh ini di komputer saya telah terinstal JDK 1.7 seperti terlihat pada gambar di bawah:</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png"><img alt="1-a program and features - JDK 1.7 sudah terinstall" class="aligncenter size-medium wp-image-767" data-attachment-id="767" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="1-a program and features – JDK 1.7 sudah terinstall" data-large-file="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png?w=300&h=141" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png" data-orig-size="976,460" data-permalink="https://firmanhid.wordpress.com/1-a-program-and-features-jdk-1-7-sudah-terinstall/" height="141" src="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png?w=300&h=141" width="300" /></a></div><div style="text-align: justify;">Bila JDK belum terinstall, download saja JDK ini dari situs Oracle. Kemudian lakukan proses install (cari petunjuk cara install JDK di google, gampang kok). Tanpa JDK, kita tidak akan bisa mencompile program yang kita buat. Dengan kata lain, kita  tidak bisa membuat program Java tanpa JDK.</div><h2 style="text-align: justify;"><b>Persiapan</b></h2><div style="text-align: justify;">Buat sebuah direktori pada C:\ dengan nama “TUTORIAL”. Direktori ini akan kita gunakan sebagai workspace. Workspace merupakan direktori tempat kita bekerja. Semua file-file project yang dibuat akan disimpan dalam workspace ini.</div><div style="text-align: justify;">Download Eclipse. Kemudian ekstrak file hasil download tersebut. Proses ekstrak ini menghasilkan sebuah direktori bernama eclipse. Pindahkan (copy-kan) direktori eclipse ini ke C:\TUTORIAL. Eclipse dapat dijalankan tanpa harus diinstall. Cukup didownload, diekstrak, lalu tinggal dijalankan. Karena itu eclipse dapat dijalankan walau disimpan dalam flashdisk. Eclipse yang digunakan pada artikel ini adalah Eclipse Juno.<span id="more-794"></span></div><div style="text-align: justify;">Di dalam direktori eclipse tersebut terdapat sebuah file bernama eclipse.exe. Untuk menjalankan eclipse, jalankan file eclipse.exe tersebut. Bila perlu, buat shortcut pada desktop untuk file eclipse.exe ini.</div><div style="text-align: justify;">Ketika menjalankan eclipse pertama kali, eclipse akan meminta kita untuk memilih workspace. Pilihlah C:\TUTORIAL sebagai workspacenya. Bila Anda kehendaki, centang pada bagian “Use this as the default and do not ask again” untuk membuat C:\TUTORIAL sebagai default workspace. Dengan pencentangan ini eclipse tidak akan bertanya tentang workspace ketika dinyalakan kembali.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/17.png"><img alt="1" class="aligncenter size-medium wp-image-766" data-attachment-id="766" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="1" data-large-file="https://firmanhid.files.wordpress.com/2014/01/17.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/17.png?w=300&h=123" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/17.png" data-orig-size="595,244" data-permalink="https://firmanhid.wordpress.com/1-6/" height="123" src="https://firmanhid.files.wordpress.com/2014/01/17.png?w=300&h=123" width="300" /></a></div><div style="text-align: justify;">Setelah eclipse menyala, pada bagian kiri terdapat panel “project explorer” (lihat pada gambar).</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/24.png"><img alt="2" class="aligncenter size-medium wp-image-768" data-attachment-id="768" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="2" data-large-file="https://firmanhid.files.wordpress.com/2014/01/24.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/24.png?w=300&h=163" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/24.png" data-orig-size="1366,744" data-permalink="https://firmanhid.wordpress.com/2-5/" height="163" src="https://firmanhid.files.wordpress.com/2014/01/24.png?w=300&h=163" width="300" /></a></div><div style="text-align: justify;">Namun bila panel “project explorer” tidak ada, panel ini dapat ditampilkan dengan cara mengklik Window –> Show View –> Other. Setelah itu akan muncul window “Show View”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/34.png"><img alt="3" class="aligncenter size-medium wp-image-769" data-attachment-id="769" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="3" data-large-file="https://firmanhid.files.wordpress.com/2014/01/34.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/34.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/34.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/3-5/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/34.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “Show View“ ini pilih General –> Project Explorer. Kemudian klik “OK”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/44.png"><img alt="4" class="aligncenter size-medium wp-image-770" data-attachment-id="770" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="4" data-large-file="https://firmanhid.files.wordpress.com/2014/01/44.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/44.png?w=300&h=212" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/44.png" data-orig-size="819,581" data-permalink="https://firmanhid.wordpress.com/4-5/" height="212" src="https://firmanhid.files.wordpress.com/2014/01/44.png?w=300&h=212" width="300" /></a></div><div style="text-align: justify;">Hasilnya adalah panel “Project Explorer” akan muncul dalam eclipse di sebelah kiri.</div><h2 style="text-align: justify;"><b>Membuat Project Baru</b></h2><div style="text-align: justify;">Dalam eclipse, setiap pembuatan program Java harus dilakukan dalam sebuah project. Untuk itu, hal pertama yang harus dilakukan adalah membuat project dalam eclipse.</div><div style="text-align: justify;">Untuk membuat project baru, lakukan klik kanan pada panel “Project Explorer”. Kemudian pilih New –> Project.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/4b.png"><img alt="4b" class="aligncenter size-medium wp-image-795" data-attachment-id="795" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="4b" data-large-file="https://firmanhid.files.wordpress.com/2014/01/4b.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/4b.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/4b.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/2014/01/17/pengantar-membangun-aplikasi-java-menggunakan-eclipse/4b/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/4b.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Setelah muncul window “New Project”, pilih Java –> Java Project. Lalu tekan tombol “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/53.png"><img alt="5" class="aligncenter size-medium wp-image-771" data-attachment-id="771" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="5" data-large-file="https://firmanhid.files.wordpress.com/2014/01/53.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/53.png?w=228&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/53.png" data-orig-size="501,658" data-permalink="https://firmanhid.wordpress.com/5-4/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/53.png?w=228&h=300" width="228" /></a></div><div style="text-align: justify;">Pada window “New Java Project”, isikan nama project pada field “Project name:”. Misalkan di sini kita memberi nama projectnya “CobaEclipse”. Perhatikan juga pada bagian checkbox “Use default location”. Pada bagian bawah checkbox tersebut ditunjukkan lokasi tempat menyimpan file-file project kita. Pada gambar terlihat project ini disimpan pada lokasi default yaitu: C:\TUTORIAL\CobaEclipse. Kemudian klik “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/62.png"><img alt="6" class="aligncenter size-medium wp-image-772" data-attachment-id="772" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="6" data-large-file="https://firmanhid.files.wordpress.com/2014/01/62.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/62.png?w=228&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/62.png" data-orig-size="501,658" data-permalink="https://firmanhid.wordpress.com/6-3/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/62.png?w=228&h=300" width="228" /></a></div><div style="text-align: justify;">Pada window “New Java Project” berikutnya klik saja “Finish”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/71.png"><img alt="7" class="aligncenter size-medium wp-image-773" data-attachment-id="773" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="7" data-large-file="https://firmanhid.files.wordpress.com/2014/01/71.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/71.png?w=228&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/71.png" data-orig-size="501,658" data-permalink="https://firmanhid.wordpress.com/7-2/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/71.png?w=228&h=300" width="228" /></a></div><div style="text-align: justify;">Kini pada panel “Project Explorer” di sebelah kiri muncul sebuah node bertuliskan “CobaEclipse”. Node itulah project yang baru kita buat barusan. Di dalam node tersebut terdapat folder “src”. Di dalam folder itulah nantinya kita akan menyimpan semua source code program java yang kita buat.</div><div style="text-align: justify;">Bila Anda lihat menggunakan windows explorer, pada direktori C:\TUTORIAL akan muncul sebuah direktori baru dengan nama CobaEclipse. Setiap kali membuat project baru, Eclipse akan membuatkan sebuah folder pada file system di sistem operasi untuk menyimpan file-file project tersebut. Nama folder ini sama dengan nama project yang dibuat.</div><div style="text-align: justify;">Untuk mencegah kehilangan data, direktori-direktori inilah yang perlu Anda backup bila Anda bekerja menggunakan Eclipse. Di dalam direktori project inilah tersimpan semua source code program yang kita buat.</div><h2 style="text-align: justify;"><b>Membuat File Java Class<br /></b></h2><div style="text-align: justify;">Untuk membuat file source code kelas Java, klik kanan pada folder “src”. Kemudian pilih New –> Other.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/81.png"><img alt="8" class="aligncenter size-medium wp-image-774" data-attachment-id="774" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="8" data-large-file="https://firmanhid.files.wordpress.com/2014/01/81.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/81.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/81.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/8-2/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/81.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “New” pilih Java –> Class. Kemudian klik “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/91.png"><img alt="9" class="aligncenter size-medium wp-image-775" data-attachment-id="775" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="9" data-large-file="https://firmanhid.files.wordpress.com/2014/01/91.png?w=495" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/91.png?w=235" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/91.png" data-orig-size="495,633" data-permalink="https://firmanhid.wordpress.com/9-2/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/91.png?w=234&h=300" width="234" /></a></div><div style="text-align: justify;">Pada window “New Java Class” isikan field “Name: “ dengan “CobaSatu”. Ini artinya kita akan membuat sebuah class java dengan nama “CobaSatu”. Kemudian klik tombol “Finish”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/101.png"><img alt="10" class="aligncenter size-medium wp-image-776" data-attachment-id="776" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="10" data-large-file="https://firmanhid.files.wordpress.com/2014/01/101.png?w=495" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/101.png?w=235" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/101.png" data-orig-size="495,633" data-permalink="https://firmanhid.wordpress.com/10-2/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/101.png?w=234&h=300" width="234" /></a></div><div style="text-align: justify;">Setelah menekan tombol “Finish” kini pada folder “src” muncul file class yang barusan kita buat. Di sini ditunjukan dengan nama CobaSatu.java. Pada panel editor, di sebelah kanan, ditampilkan source code class CobaSatu.java ini.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/112.png"><img alt="11" class="aligncenter size-medium wp-image-777" data-attachment-id="777" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="11" data-large-file="https://firmanhid.files.wordpress.com/2014/01/112.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/112.png?w=300&h=163" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/112.png" data-orig-size="1366,744" data-permalink="https://firmanhid.wordpress.com/11-2/" height="163" src="https://firmanhid.files.wordpress.com/2014/01/112.png?w=300&h=163" width="300" /></a></div><div style="text-align: justify;">Ubah koding kelas CobaSatu ini menjadi seperti ini:</div><div><div class="syntaxhighlighter java" id="highlighter_216138"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="gutter"><div class="line number1 index0 alt2">1</div><div class="line number2 index1 alt1">2</div><div class="line number3 index2 alt2">3</div><div class="line number4 index3 alt1">4</div><div class="line number5 index4 alt2">5</div></td><td class="code"><div class="container"><div class="line number1 index0 alt2"><code class="java keyword">public</code> <code class="java keyword">class</code> <code class="java plain">CobaSatu {</code></div><div class="line number2 index1 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">static</code> <code class="java keyword">void</code> <code class="java plain">main(String[] args) {</code></div><div class="line number3 index2 alt2"><code class="java spaces">        </code><code class="java plain">System.out.println(</code><code class="java string">"Coba kelas pertamaku"</code><code class="java plain">);</code></div><div class="line number4 index3 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number5 index4 alt2"><code class="java plain">}</code></div></div></td></tr></tbody></table></div></div><div style="text-align: justify;">Kemudian simpan dengan cara File –> Save All. Setelah itu klik kanan pada node CobaSatu.java di panel Project Explorer. Kemudian pilih Run As –> Java Application. Proses ini akan menjalankan/mengeksekusi source code program yang baru kita buat barusan.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/121.png"><img alt="12" class="aligncenter size-medium wp-image-778" data-attachment-id="778" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="12" data-large-file="https://firmanhid.files.wordpress.com/2014/01/121.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/121.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/121.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/12-2/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/121.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Hasil eksekusi program ini ditampilkan pada panel Console yang ada di bagian bawah Editor eclipse. Output yang dihasilkan adalah tulisan pada console:</div><blockquote><div style="text-align: justify;">Coba kelas pertamaku</div></blockquote><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/131.png"><img alt="13" class="aligncenter size-medium wp-image-779" data-attachment-id="779" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="13" data-large-file="https://firmanhid.files.wordpress.com/2014/01/131.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/131.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/131.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/13-2/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/131.png?w=300&h=188" width="300" /></a></div><div style="text-align: justify;">Sampai di sini kita sudah selesai membuat sebuah project pada eclipse sekaligus membuat sebuah sebuah kelas dan menjalankan kelas tersebut pada eclipse. Kira-kira seperti inilah gambaran umum cara membuat program menggunakan eclipse.</div><h2 style="text-align: justify;"><b>Membuat Package</b></h2><div style="text-align: justify;">Pada panel Project Explorer, klik kanan pada node “src” kemudian pilih New –> Other.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/141.png"><img alt="14" class="aligncenter size-medium wp-image-780" data-attachment-id="780" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="14" data-large-file="https://firmanhid.files.wordpress.com/2014/01/141.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/141.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/141.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/14/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/141.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “New” pilih Java –> Package. Kemudian klik “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/151.png"><img alt="15" class="aligncenter size-medium wp-image-781" data-attachment-id="781" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="15" data-large-file="https://firmanhid.files.wordpress.com/2014/01/151.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/151.png?w=278&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/151.png" data-orig-size="532,574" data-permalink="https://firmanhid.wordpress.com/15/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/151.png?w=278&h=300" width="278" /></a></div><div style="text-align: justify;">Pada window “New Java Package” isikan nama package dengan nama “id.co.firman” pada field “Name:”. Kemudian klik tombol Finish.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/161.png"><img alt="16" class="aligncenter size-medium wp-image-782" data-attachment-id="782" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="16" data-large-file="https://firmanhid.files.wordpress.com/2014/01/161.png?w=438" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/161.png?w=300&h=283" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/161.png" data-orig-size="438,414" data-permalink="https://firmanhid.wordpress.com/16/" height="283" src="https://firmanhid.files.wordpress.com/2014/01/161.png?w=300&h=283" width="300" /></a></div><div style="text-align: justify;">Kini coba perhatikan pada panel Project Explorer.  Di dalam node “src” kini bertambah package yang barusan kita buat yaitu node “id.co.firman”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/171.png"><img alt="17" class="aligncenter size-medium wp-image-783" data-attachment-id="783" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="17" data-large-file="https://firmanhid.files.wordpress.com/2014/01/171.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/171.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/171.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/17/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/171.png?w=300&h=188" width="300" /></a></div><h2 style="text-align: justify;"><b>Memindahkan File Class Ke Package Lain</b></h2><div style="text-align: justify;">File CobaSatu.java masih berada di luar package id.co.firman. Dalam hal ini dalam eclipse terlihat file CobaSatu.java berada pada default package. Kita akan memindahkan file CobaSatu.java ini ke dalam id.co.firman.</div><div style="text-align: justify;">Pada panel Project Explorer, klik kanan pada class CobaSatu.java. Kemudian pilih Refactor –> Move.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/18.png"><img alt="18" class="aligncenter size-medium wp-image-784" data-attachment-id="784" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="18" data-large-file="https://firmanhid.files.wordpress.com/2014/01/18.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/18.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/18.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/18/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/18.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “Move” pilih package tujuan pemindahan file. Dalam hal ini kita pilih “id.co.firman”. Kemudian klik “OK”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/19.png"><img alt="19" class="aligncenter size-medium wp-image-785" data-attachment-id="785" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="19" data-large-file="https://firmanhid.files.wordpress.com/2014/01/19.png?w=408" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/19.png?w=300&h=296" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/19.png" data-orig-size="408,403" data-permalink="https://firmanhid.wordpress.com/19/" height="296" src="https://firmanhid.files.wordpress.com/2014/01/19.png?w=300&h=296" width="300" /></a></div><div style="text-align: justify;">Coba perhatikan di panel Project Explorer. Kini file kelas CobaSatu.java sudah berada di dalam package id.co.firman.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/20.png"><img alt="20" class="aligncenter size-medium wp-image-786" data-attachment-id="786" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="20" data-large-file="https://firmanhid.files.wordpress.com/2014/01/20.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/20.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/20.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/20/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/20.png?w=300&h=188" width="300" /></a></div><div style="text-align: justify;">Dan lihat pula pada source code CobaEclipse.java. Pada baris pertama kini ditambahkan statement “package id.co.firman;”.  Statement ini secara otomatis ditambahkan oleh Eclipse. Dalam Java, statement ini menyatakan lokasi package tempat kelas ini berada. Biasanya statement ini harus ditulis secara manual oleh sang programmer. Tapi bila menggunakan fasilitas refactor kepunyaan Eclipse, si Eclipse akan mengeditkannya untuk kita.</div><div style="text-align: justify;">Demikianlah cara memindahkan file, yaitu dengan cara Refactor –> Move.</div><h2 style="text-align: justify;"><b>Membuat File Class dalam Package</b></h2><div style="text-align: justify;">Klik kanan pada package id.co.firman. Pilih New –> Other.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/211.png"><img alt="21" class="aligncenter size-medium wp-image-787" data-attachment-id="787" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="21" data-large-file="https://firmanhid.files.wordpress.com/2014/01/211.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/211.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/211.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/21/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/211.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “New” pilih Java –> Class. Kemudian klik “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/221.png"><img alt="22" class="aligncenter size-medium wp-image-788" data-attachment-id="788" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="22" data-large-file="https://firmanhid.files.wordpress.com/2014/01/221.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/221.png?w=251" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/221.png" data-orig-size="500,598" data-permalink="https://firmanhid.wordpress.com/22/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/221.png?w=250&h=300" width="250" /></a></div><div style="text-align: justify;">Pada window “New Java Class”, beri nama kelas yang baru ini dengan nama “CobaDua” dengan mengisi field “Name:” dengan nilai “CobaDua”. Coba perhatikan field “Package:” tertulis nilai “id.co.firman”. Ini artinya kelas yang kita buat ini akan berada di dalam package id.co.firman. Kemudian klik “Finish”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/231.png"><img alt="23" class="aligncenter size-medium wp-image-789" data-attachment-id="789" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="23" data-large-file="https://firmanhid.files.wordpress.com/2014/01/231.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/231.png?w=251" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/231.png" data-orig-size="500,598" data-permalink="https://firmanhid.wordpress.com/23/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/231.png?w=250&h=300" width="250" /></a></div><div style="text-align: justify;">Pada panel Project Explorer, kini file kelas CobaDua.java berada dalam package id.co.firman.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/241.png"><img alt="24" class="aligncenter size-medium wp-image-790" data-attachment-id="790" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="24" data-large-file="https://firmanhid.files.wordpress.com/2014/01/241.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/241.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/241.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/24/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/241.png?w=300&h=188" width="300" /></a></div><h2 style="text-align: justify;"><b>Membuat Getter dan Setter pada Eclipse</b></h2><div style="text-align: justify;">Seperti pernah diutarakan pada artikel sebelumnya (<a href="https://firmanhid.wordpress.com/2014/01/14/getter-dan-setter-pada-kelas-java/" target="_blank">Getter dan Setter pada Kelas Java</a>), sebaiknya atribut sebuah kelas menggunakan akses level selain public. Untuk itu, di sini kita akan membuat method getter dan setter dengan bantuan eclipse.</div><div style="text-align: justify;">Pada kelas CobaDua, buat dua buah atribut String dengan level akses private. Kedua atribut ini adalah nama dan alamat.</div><div><div class="syntaxhighlighter java" id="highlighter_961991"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="gutter"><div class="line number1 index0 alt2">1</div><div class="line number2 index1 alt1">2</div></td><td class="code"><div class="container"><div class="line number1 index0 alt2"><code class="java keyword">private</code> <code class="java plain">String nama;</code></div><div class="line number2 index1 alt1"><code class="java keyword">private</code> <code class="java plain">String alamat;</code></div></div></td></tr></tbody></table></div></div><div style="text-align: justify;">Kemudian, tempatkan kursor di bawah kedua atribut tersebut. Lalu klik kanan pada daerah tersebut. Pllih Source –> Generate Getters and Setters…</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/25.png"><img alt="25" class="aligncenter size-medium wp-image-791" data-attachment-id="791" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="25" data-large-file="https://firmanhid.files.wordpress.com/2014/01/25.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/25.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/25.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/25/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/25.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “Generate Getters and Setters”, beri centang pada checkbox atribut alamat dan nama seperti pada gambar. Lalu tekan “OK”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/26.png"><img alt="26" class="aligncenter size-medium wp-image-792" data-attachment-id="792" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="26" data-large-file="https://firmanhid.files.wordpress.com/2014/01/26.png?w=480" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/26.png?w=233&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/26.png" data-orig-size="480,617" data-permalink="https://firmanhid.wordpress.com/26/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/26.png?w=233&h=300" width="233" /></a></div><div style="text-align: justify;">Coba perhatikan pada source code kini sudah ditambahkan method getter dan setter untuk atribut nama dan alamat. Simpan semua perubahan ini dengan memilih File –> Save All.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/27.png"><img alt="27" class="aligncenter wp-image-793" data-attachment-id="793" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="27" data-large-file="https://firmanhid.files.wordpress.com/2014/01/27.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/27.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/27.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/27/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/27.png?w=300&h=188" width="300" /></a></div><div style="text-align: justify;">Secara lengkap kode pada kelas CobaDua menjadi seperti ini:</div><div><div class="syntaxhighlighter java" id="highlighter_505344"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="gutter"><div class="line number1 index0 alt2">1</div><div class="line number2 index1 alt1">2</div><div class="line number3 index2 alt2">3</div><div class="line number4 index3 alt1">4</div><div class="line number5 index4 alt2">5</div><div class="line number6 index5 alt1">6</div><div class="line number7 index6 alt2">7</div><div class="line number8 index7 alt1">8</div><div class="line number9 index8 alt2">9</div><div class="line number10 index9 alt1">10</div><div class="line number11 index10 alt2">11</div><div class="line number12 index11 alt1">12</div><div class="line number13 index12 alt2">13</div><div class="line number14 index13 alt1">14</div><div class="line number15 index14 alt2">15</div><div class="line number16 index15 alt1">16</div><div class="line number17 index16 alt2">17</div><div class="line number18 index17 alt1">18</div></td><td class="code"><div class="container"><div class="line number1 index0 alt2"><code class="java keyword">package</code> <code class="java plain">id.co.firman;</code></div><div class="line number2 index1 alt1"> </div><div class="line number3 index2 alt2"><code class="java keyword">public</code> <code class="java keyword">class</code> <code class="java plain">CobaDua {</code></div><div class="line number4 index3 alt1"><code class="java spaces">    </code><code class="java keyword">private</code> <code class="java plain">String nama;</code></div><div class="line number5 index4 alt2"><code class="java spaces">    </code><code class="java keyword">private</code> <code class="java plain">String alamat;</code></div><div class="line number6 index5 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java plain">String getNama() {</code></div><div class="line number7 index6 alt2"><code class="java spaces">        </code><code class="java keyword">return</code> <code class="java plain">nama;</code></div><div class="line number8 index7 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number9 index8 alt2"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">void</code> <code class="java plain">setNama(String nama) {</code></div><div class="line number10 index9 alt1"><code class="java spaces">        </code><code class="java keyword">this</code><code class="java plain">.nama = nama;</code></div><div class="line number11 index10 alt2"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number12 index11 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java plain">String getAlamat() {</code></div><div class="line number13 index12 alt2"><code class="java spaces">        </code><code class="java keyword">return</code> <code class="java plain">alamat;</code></div><div class="line number14 index13 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number15 index14 alt2"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">void</code> <code class="java plain">setAlamat(String alamat) {</code></div><div class="line number16 index15 alt1"><code class="java spaces">        </code><code class="java keyword">this</code><code class="java plain">.alamat = alamat;</code></div><div class="line number17 index16 alt2"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number18 index17 alt1"><code class="java plain">}</code></div></div></td></tr></tbody></table></div></div><div style="text-align: justify;">Dengan cara ini kita tidak perlu menuliskan method getter dan setter secara manual. Eclipse sudah cukup pintar untuk membuatkan getter dan setter ini. Kita cukup memodifikasi method-method ini bila perlu.</div><div style="text-align: justify;"> </div><div class="postnav"> <div class="alignleft">« <a href="https://firmanhid.wordpress.com/2014/01/17/banyak-yang-perlu-dieksplor-dari-hibernatejpa/" rel="prev">Banyak yang Perlu Dieksplor dari Hibernate/JPA</a></div><div class="alignright"><a href="https://firmanhid.wordpress.com/2014/01/19/maen-game-tanpa-henti/" rel="next">Main Game Tanpa Henti</a> »</div></div><div class="posttitle"> <h2>Membangun Aplikasi Java Menggunakan Eclipse</h2><div class="post-info">17 January 2014 by <a href="https://firmanhid.wordpress.com/author/firmanhidadjat/" title="Posts by Firman Hidayat">Firman Hidayat</a> </div></div><div style="text-align: justify;">Pada tulisan ini dibahas beberapa hal mendasar yang saya rasa penting diketahui dalam penggunaan Eclipse untuk membangun aplikasi Java. Beberapa hal yang dibahas adalah: pembuatan workspace, cara membuat project, cara membuat Java class, dan cara membuat package.</div><div style="text-align: justify;">Konsep abstraction, encapsulation, inheritance dan polymorphism yang telah dibahas pada Tutorial Object Oriented Programming dengan Java Bagian <a href="https://firmanhid.wordpress.com/2014/01/11/tutorial-object-oriented-programming-dengan-java-bagian-2/" target="_blank">2</a>, <a href="https://firmanhid.wordpress.com/2014/01/11/tutorial-object-oriented-programming-dengan-java-bagian-3/" target="_blank">3</a> dan <a href="https://firmanhid.wordpress.com/2014/01/11/tutorial-object-oriented-programming-dengan-java-bagian-4/" target="_blank">4</a> dapat diterapkan menggunakan Eclipse. Yang berbeda di sini hanyalah Integrated Development Environment (IDE) saja. Pada artikel-artikel tersebut IDE  yang digunakan adalah Netbeans.</div><h2 style="text-align: justify;"><strong>Java Development Kit</strong></h2><div style="text-align: justify;">Pastikan Java Development Kit (JDK) sudah terinstall pada komputer. Bila belum, install JDK terbaru pada komputer Anda. Pada contoh ini di komputer saya telah terinstal JDK 1.7 seperti terlihat pada gambar di bawah:</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png"><img alt="1-a program and features - JDK 1.7 sudah terinstall" class="aligncenter size-medium wp-image-767" data-attachment-id="767" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="1-a program and features – JDK 1.7 sudah terinstall" data-large-file="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png?w=300&h=141" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png" data-orig-size="976,460" data-permalink="https://firmanhid.wordpress.com/1-a-program-and-features-jdk-1-7-sudah-terinstall/" height="141" src="https://firmanhid.files.wordpress.com/2014/01/1-a-program-and-features-jdk-1-7-sudah-terinstall.png?w=300&h=141" width="300" /></a></div><div style="text-align: justify;">Bila JDK belum terinstall, download saja JDK ini dari situs Oracle. Kemudian lakukan proses install (cari petunjuk cara install JDK di google, gampang kok). Tanpa JDK, kita tidak akan bisa mencompile program yang kita buat. Dengan kata lain, kita  tidak bisa membuat program Java tanpa JDK.</div><h2 style="text-align: justify;"><b>Persiapan</b></h2><div style="text-align: justify;">Buat sebuah direktori pada C:\ dengan nama “TUTORIAL”. Direktori ini akan kita gunakan sebagai workspace. Workspace merupakan direktori tempat kita bekerja. Semua file-file project yang dibuat akan disimpan dalam workspace ini.</div><div style="text-align: justify;">Download Eclipse. Kemudian ekstrak file hasil download tersebut. Proses ekstrak ini menghasilkan sebuah direktori bernama eclipse. Pindahkan (copy-kan) direktori eclipse ini ke C:\TUTORIAL. Eclipse dapat dijalankan tanpa harus diinstall. Cukup didownload, diekstrak, lalu tinggal dijalankan. Karena itu eclipse dapat dijalankan walau disimpan dalam flashdisk. Eclipse yang digunakan pada artikel ini adalah Eclipse Juno.<span id="more-794"></span></div><div style="text-align: justify;">Di dalam direktori eclipse tersebut terdapat sebuah file bernama eclipse.exe. Untuk menjalankan eclipse, jalankan file eclipse.exe tersebut. Bila perlu, buat shortcut pada desktop untuk file eclipse.exe ini.</div><div style="text-align: justify;">Ketika menjalankan eclipse pertama kali, eclipse akan meminta kita untuk memilih workspace. Pilihlah C:\TUTORIAL sebagai workspacenya. Bila Anda kehendaki, centang pada bagian “Use this as the default and do not ask again” untuk membuat C:\TUTORIAL sebagai default workspace. Dengan pencentangan ini eclipse tidak akan bertanya tentang workspace ketika dinyalakan kembali.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/17.png"><img alt="1" class="aligncenter size-medium wp-image-766" data-attachment-id="766" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="1" data-large-file="https://firmanhid.files.wordpress.com/2014/01/17.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/17.png?w=300&h=123" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/17.png" data-orig-size="595,244" data-permalink="https://firmanhid.wordpress.com/1-6/" height="123" src="https://firmanhid.files.wordpress.com/2014/01/17.png?w=300&h=123" width="300" /></a></div><div style="text-align: justify;">Setelah eclipse menyala, pada bagian kiri terdapat panel “project explorer” (lihat pada gambar).</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/24.png"><img alt="2" class="aligncenter size-medium wp-image-768" data-attachment-id="768" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="2" data-large-file="https://firmanhid.files.wordpress.com/2014/01/24.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/24.png?w=300&h=163" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/24.png" data-orig-size="1366,744" data-permalink="https://firmanhid.wordpress.com/2-5/" height="163" src="https://firmanhid.files.wordpress.com/2014/01/24.png?w=300&h=163" width="300" /></a></div><div style="text-align: justify;">Namun bila panel “project explorer” tidak ada, panel ini dapat ditampilkan dengan cara mengklik Window –> Show View –> Other. Setelah itu akan muncul window “Show View”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/34.png"><img alt="3" class="aligncenter size-medium wp-image-769" data-attachment-id="769" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="3" data-large-file="https://firmanhid.files.wordpress.com/2014/01/34.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/34.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/34.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/3-5/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/34.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “Show View“ ini pilih General –> Project Explorer. Kemudian klik “OK”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/44.png"><img alt="4" class="aligncenter size-medium wp-image-770" data-attachment-id="770" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="4" data-large-file="https://firmanhid.files.wordpress.com/2014/01/44.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/44.png?w=300&h=212" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/44.png" data-orig-size="819,581" data-permalink="https://firmanhid.wordpress.com/4-5/" height="212" src="https://firmanhid.files.wordpress.com/2014/01/44.png?w=300&h=212" width="300" /></a></div><div style="text-align: justify;">Hasilnya adalah panel “Project Explorer” akan muncul dalam eclipse di sebelah kiri.</div><h2 style="text-align: justify;"><b>Membuat Project Baru</b></h2><div style="text-align: justify;">Dalam eclipse, setiap pembuatan program Java harus dilakukan dalam sebuah project. Untuk itu, hal pertama yang harus dilakukan adalah membuat project dalam eclipse.</div><div style="text-align: justify;">Untuk membuat project baru, lakukan klik kanan pada panel “Project Explorer”. Kemudian pilih New –> Project.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/4b.png"><img alt="4b" class="aligncenter size-medium wp-image-795" data-attachment-id="795" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="4b" data-large-file="https://firmanhid.files.wordpress.com/2014/01/4b.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/4b.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/4b.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/2014/01/17/pengantar-membangun-aplikasi-java-menggunakan-eclipse/4b/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/4b.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Setelah muncul window “New Project”, pilih Java –> Java Project. Lalu tekan tombol “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/53.png"><img alt="5" class="aligncenter size-medium wp-image-771" data-attachment-id="771" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="5" data-large-file="https://firmanhid.files.wordpress.com/2014/01/53.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/53.png?w=228&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/53.png" data-orig-size="501,658" data-permalink="https://firmanhid.wordpress.com/5-4/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/53.png?w=228&h=300" width="228" /></a></div><div style="text-align: justify;">Pada window “New Java Project”, isikan nama project pada field “Project name:”. Misalkan di sini kita memberi nama projectnya “CobaEclipse”. Perhatikan juga pada bagian checkbox “Use default location”. Pada bagian bawah checkbox tersebut ditunjukkan lokasi tempat menyimpan file-file project kita. Pada gambar terlihat project ini disimpan pada lokasi default yaitu: C:\TUTORIAL\CobaEclipse. Kemudian klik “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/62.png"><img alt="6" class="aligncenter size-medium wp-image-772" data-attachment-id="772" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="6" data-large-file="https://firmanhid.files.wordpress.com/2014/01/62.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/62.png?w=228&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/62.png" data-orig-size="501,658" data-permalink="https://firmanhid.wordpress.com/6-3/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/62.png?w=228&h=300" width="228" /></a></div><div style="text-align: justify;">Pada window “New Java Project” berikutnya klik saja “Finish”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/71.png"><img alt="7" class="aligncenter size-medium wp-image-773" data-attachment-id="773" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="7" data-large-file="https://firmanhid.files.wordpress.com/2014/01/71.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/71.png?w=228&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/71.png" data-orig-size="501,658" data-permalink="https://firmanhid.wordpress.com/7-2/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/71.png?w=228&h=300" width="228" /></a></div><div style="text-align: justify;">Kini pada panel “Project Explorer” di sebelah kiri muncul sebuah node bertuliskan “CobaEclipse”. Node itulah project yang baru kita buat barusan. Di dalam node tersebut terdapat folder “src”. Di dalam folder itulah nantinya kita akan menyimpan semua source code program java yang kita buat.</div><div style="text-align: justify;">Bila Anda lihat menggunakan windows explorer, pada direktori C:\TUTORIAL akan muncul sebuah direktori baru dengan nama CobaEclipse. Setiap kali membuat project baru, Eclipse akan membuatkan sebuah folder pada file system di sistem operasi untuk menyimpan file-file project tersebut. Nama folder ini sama dengan nama project yang dibuat.</div><div style="text-align: justify;">Untuk mencegah kehilangan data, direktori-direktori inilah yang perlu Anda backup bila Anda bekerja menggunakan Eclipse. Di dalam direktori project inilah tersimpan semua source code program yang kita buat.</div><h2 style="text-align: justify;"><b>Membuat File Java Class<br /></b></h2><div style="text-align: justify;">Untuk membuat file source code kelas Java, klik kanan pada folder “src”. Kemudian pilih New –> Other.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/81.png"><img alt="8" class="aligncenter size-medium wp-image-774" data-attachment-id="774" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="8" data-large-file="https://firmanhid.files.wordpress.com/2014/01/81.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/81.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/81.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/8-2/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/81.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “New” pilih Java –> Class. Kemudian klik “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/91.png"><img alt="9" class="aligncenter size-medium wp-image-775" data-attachment-id="775" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="9" data-large-file="https://firmanhid.files.wordpress.com/2014/01/91.png?w=495" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/91.png?w=235" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/91.png" data-orig-size="495,633" data-permalink="https://firmanhid.wordpress.com/9-2/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/91.png?w=234&h=300" width="234" /></a></div><div style="text-align: justify;">Pada window “New Java Class” isikan field “Name: “ dengan “CobaSatu”. Ini artinya kita akan membuat sebuah class java dengan nama “CobaSatu”. Kemudian klik tombol “Finish”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/101.png"><img alt="10" class="aligncenter size-medium wp-image-776" data-attachment-id="776" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="10" data-large-file="https://firmanhid.files.wordpress.com/2014/01/101.png?w=495" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/101.png?w=235" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/101.png" data-orig-size="495,633" data-permalink="https://firmanhid.wordpress.com/10-2/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/101.png?w=234&h=300" width="234" /></a></div><div style="text-align: justify;">Setelah menekan tombol “Finish” kini pada folder “src” muncul file class yang barusan kita buat. Di sini ditunjukan dengan nama CobaSatu.java. Pada panel editor, di sebelah kanan, ditampilkan source code class CobaSatu.java ini.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/112.png"><img alt="11" class="aligncenter size-medium wp-image-777" data-attachment-id="777" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="11" data-large-file="https://firmanhid.files.wordpress.com/2014/01/112.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/112.png?w=300&h=163" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/112.png" data-orig-size="1366,744" data-permalink="https://firmanhid.wordpress.com/11-2/" height="163" src="https://firmanhid.files.wordpress.com/2014/01/112.png?w=300&h=163" width="300" /></a></div><div style="text-align: justify;">Ubah koding kelas CobaSatu ini menjadi seperti ini:</div><div><div class="syntaxhighlighter java" id="highlighter_216138"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="gutter"><div class="line number1 index0 alt2">1</div><div class="line number2 index1 alt1">2</div><div class="line number3 index2 alt2">3</div><div class="line number4 index3 alt1">4</div><div class="line number5 index4 alt2">5</div></td><td class="code"><div class="container"><div class="line number1 index0 alt2"><code class="java keyword">public</code> <code class="java keyword">class</code> <code class="java plain">CobaSatu {</code></div><div class="line number2 index1 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">static</code> <code class="java keyword">void</code> <code class="java plain">main(String[] args) {</code></div><div class="line number3 index2 alt2"><code class="java spaces">        </code><code class="java plain">System.out.println(</code><code class="java string">"Coba kelas pertamaku"</code><code class="java plain">);</code></div><div class="line number4 index3 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number5 index4 alt2"><code class="java plain">}</code></div></div></td></tr></tbody></table></div></div><div style="text-align: justify;">Kemudian simpan dengan cara File –> Save All. Setelah itu klik kanan pada node CobaSatu.java di panel Project Explorer. Kemudian pilih Run As –> Java Application. Proses ini akan menjalankan/mengeksekusi source code program yang baru kita buat barusan.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/121.png"><img alt="12" class="aligncenter size-medium wp-image-778" data-attachment-id="778" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="12" data-large-file="https://firmanhid.files.wordpress.com/2014/01/121.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/121.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/121.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/12-2/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/121.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Hasil eksekusi program ini ditampilkan pada panel Console yang ada di bagian bawah Editor eclipse. Output yang dihasilkan adalah tulisan pada console:</div><blockquote><div style="text-align: justify;">Coba kelas pertamaku</div></blockquote><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/131.png"><img alt="13" class="aligncenter size-medium wp-image-779" data-attachment-id="779" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="13" data-large-file="https://firmanhid.files.wordpress.com/2014/01/131.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/131.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/131.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/13-2/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/131.png?w=300&h=188" width="300" /></a></div><div style="text-align: justify;">Sampai di sini kita sudah selesai membuat sebuah project pada eclipse sekaligus membuat sebuah sebuah kelas dan menjalankan kelas tersebut pada eclipse. Kira-kira seperti inilah gambaran umum cara membuat program menggunakan eclipse.</div><h2 style="text-align: justify;"><b>Membuat Package</b></h2><div style="text-align: justify;">Pada panel Project Explorer, klik kanan pada node “src” kemudian pilih New –> Other.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/141.png"><img alt="14" class="aligncenter size-medium wp-image-780" data-attachment-id="780" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="14" data-large-file="https://firmanhid.files.wordpress.com/2014/01/141.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/141.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/141.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/14/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/141.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “New” pilih Java –> Package. Kemudian klik “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/151.png"><img alt="15" class="aligncenter size-medium wp-image-781" data-attachment-id="781" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="15" data-large-file="https://firmanhid.files.wordpress.com/2014/01/151.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/151.png?w=278&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/151.png" data-orig-size="532,574" data-permalink="https://firmanhid.wordpress.com/15/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/151.png?w=278&h=300" width="278" /></a></div><div style="text-align: justify;">Pada window “New Java Package” isikan nama package dengan nama “id.co.firman” pada field “Name:”. Kemudian klik tombol Finish.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/161.png"><img alt="16" class="aligncenter size-medium wp-image-782" data-attachment-id="782" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="16" data-large-file="https://firmanhid.files.wordpress.com/2014/01/161.png?w=438" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/161.png?w=300&h=283" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/161.png" data-orig-size="438,414" data-permalink="https://firmanhid.wordpress.com/16/" height="283" src="https://firmanhid.files.wordpress.com/2014/01/161.png?w=300&h=283" width="300" /></a></div><div style="text-align: justify;">Kini coba perhatikan pada panel Project Explorer.  Di dalam node “src” kini bertambah package yang barusan kita buat yaitu node “id.co.firman”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/171.png"><img alt="17" class="aligncenter size-medium wp-image-783" data-attachment-id="783" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="17" data-large-file="https://firmanhid.files.wordpress.com/2014/01/171.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/171.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/171.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/17/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/171.png?w=300&h=188" width="300" /></a></div><h2 style="text-align: justify;"><b>Memindahkan File Class Ke Package Lain</b></h2><div style="text-align: justify;">File CobaSatu.java masih berada di luar package id.co.firman. Dalam hal ini dalam eclipse terlihat file CobaSatu.java berada pada default package. Kita akan memindahkan file CobaSatu.java ini ke dalam id.co.firman.</div><div style="text-align: justify;">Pada panel Project Explorer, klik kanan pada class CobaSatu.java. Kemudian pilih Refactor –> Move.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/18.png"><img alt="18" class="aligncenter size-medium wp-image-784" data-attachment-id="784" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="18" data-large-file="https://firmanhid.files.wordpress.com/2014/01/18.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/18.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/18.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/18/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/18.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “Move” pilih package tujuan pemindahan file. Dalam hal ini kita pilih “id.co.firman”. Kemudian klik “OK”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/19.png"><img alt="19" class="aligncenter size-medium wp-image-785" data-attachment-id="785" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="19" data-large-file="https://firmanhid.files.wordpress.com/2014/01/19.png?w=408" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/19.png?w=300&h=296" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/19.png" data-orig-size="408,403" data-permalink="https://firmanhid.wordpress.com/19/" height="296" src="https://firmanhid.files.wordpress.com/2014/01/19.png?w=300&h=296" width="300" /></a></div><div style="text-align: justify;">Coba perhatikan di panel Project Explorer. Kini file kelas CobaSatu.java sudah berada di dalam package id.co.firman.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/20.png"><img alt="20" class="aligncenter size-medium wp-image-786" data-attachment-id="786" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="20" data-large-file="https://firmanhid.files.wordpress.com/2014/01/20.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/20.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/20.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/20/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/20.png?w=300&h=188" width="300" /></a></div><div style="text-align: justify;">Dan lihat pula pada source code CobaEclipse.java. Pada baris pertama kini ditambahkan statement “package id.co.firman;”.  Statement ini secara otomatis ditambahkan oleh Eclipse. Dalam Java, statement ini menyatakan lokasi package tempat kelas ini berada. Biasanya statement ini harus ditulis secara manual oleh sang programmer. Tapi bila menggunakan fasilitas refactor kepunyaan Eclipse, si Eclipse akan mengeditkannya untuk kita.</div><div style="text-align: justify;">Demikianlah cara memindahkan file, yaitu dengan cara Refactor –> Move.</div><h2 style="text-align: justify;"><b>Membuat File Class dalam Package</b></h2><div style="text-align: justify;">Klik kanan pada package id.co.firman. Pilih New –> Other.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/211.png"><img alt="21" class="aligncenter size-medium wp-image-787" data-attachment-id="787" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="21" data-large-file="https://firmanhid.files.wordpress.com/2014/01/211.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/211.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/211.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/21/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/211.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “New” pilih Java –> Class. Kemudian klik “Next”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/221.png"><img alt="22" class="aligncenter size-medium wp-image-788" data-attachment-id="788" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="22" data-large-file="https://firmanhid.files.wordpress.com/2014/01/221.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/221.png?w=251" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/221.png" data-orig-size="500,598" data-permalink="https://firmanhid.wordpress.com/22/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/221.png?w=250&h=300" width="250" /></a></div><div style="text-align: justify;">Pada window “New Java Class”, beri nama kelas yang baru ini dengan nama “CobaDua” dengan mengisi field “Name:” dengan nilai “CobaDua”. Coba perhatikan field “Package:” tertulis nilai “id.co.firman”. Ini artinya kelas yang kita buat ini akan berada di dalam package id.co.firman. Kemudian klik “Finish”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/231.png"><img alt="23" class="aligncenter size-medium wp-image-789" data-attachment-id="789" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="23" data-large-file="https://firmanhid.files.wordpress.com/2014/01/231.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/231.png?w=251" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/231.png" data-orig-size="500,598" data-permalink="https://firmanhid.wordpress.com/23/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/231.png?w=250&h=300" width="250" /></a></div><div style="text-align: justify;">Pada panel Project Explorer, kini file kelas CobaDua.java berada dalam package id.co.firman.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/241.png"><img alt="24" class="aligncenter size-medium wp-image-790" data-attachment-id="790" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="24" data-large-file="https://firmanhid.files.wordpress.com/2014/01/241.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/241.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/241.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/24/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/241.png?w=300&h=188" width="300" /></a></div><h2 style="text-align: justify;"><b>Membuat Getter dan Setter pada Eclipse</b></h2><div style="text-align: justify;">Seperti pernah diutarakan pada artikel sebelumnya (<a href="https://firmanhid.wordpress.com/2014/01/14/getter-dan-setter-pada-kelas-java/" target="_blank">Getter dan Setter pada Kelas Java</a>), sebaiknya atribut sebuah kelas menggunakan akses level selain public. Untuk itu, di sini kita akan membuat method getter dan setter dengan bantuan eclipse.</div><div style="text-align: justify;">Pada kelas CobaDua, buat dua buah atribut String dengan level akses private. Kedua atribut ini adalah nama dan alamat.</div><div><div class="syntaxhighlighter java" id="highlighter_961991"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="gutter"><div class="line number1 index0 alt2">1</div><div class="line number2 index1 alt1">2</div></td><td class="code"><div class="container"><div class="line number1 index0 alt2"><code class="java keyword">private</code> <code class="java plain">String nama;</code></div><div class="line number2 index1 alt1"><code class="java keyword">private</code> <code class="java plain">String alamat;</code></div></div></td></tr></tbody></table></div></div><div style="text-align: justify;">Kemudian, tempatkan kursor di bawah kedua atribut tersebut. Lalu klik kanan pada daerah tersebut. Pllih Source –> Generate Getters and Setters…</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/25.png"><img alt="25" class="aligncenter size-medium wp-image-791" data-attachment-id="791" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="25" data-large-file="https://firmanhid.files.wordpress.com/2014/01/25.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/25.png?w=300&h=168" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/25.png" data-orig-size="1366,768" data-permalink="https://firmanhid.wordpress.com/25/" height="168" src="https://firmanhid.files.wordpress.com/2014/01/25.png?w=300&h=168" width="300" /></a></div><div style="text-align: justify;">Pada window “Generate Getters and Setters”, beri centang pada checkbox atribut alamat dan nama seperti pada gambar. Lalu tekan “OK”.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/26.png"><img alt="26" class="aligncenter size-medium wp-image-792" data-attachment-id="792" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="26" data-large-file="https://firmanhid.files.wordpress.com/2014/01/26.png?w=480" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/26.png?w=233&h=300" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/26.png" data-orig-size="480,617" data-permalink="https://firmanhid.wordpress.com/26/" height="300" src="https://firmanhid.files.wordpress.com/2014/01/26.png?w=233&h=300" width="233" /></a></div><div style="text-align: justify;">Coba perhatikan pada source code kini sudah ditambahkan method getter dan setter untuk atribut nama dan alamat. Simpan semua perubahan ini dengan memilih File –> Save All.</div><div style="text-align: justify;"><a href="https://firmanhid.files.wordpress.com/2014/01/27.png"><img alt="27" class="aligncenter wp-image-793" data-attachment-id="793" data-comments-opened="1" data-image-description="" data-image-meta="{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}" data-image-title="27" data-large-file="https://firmanhid.files.wordpress.com/2014/01/27.png?w=500" data-medium-file="https://firmanhid.files.wordpress.com/2014/01/27.png?w=300&h=188" data-orig-file="https://firmanhid.files.wordpress.com/2014/01/27.png" data-orig-size="1024,645" data-permalink="https://firmanhid.wordpress.com/27/" height="188" src="https://firmanhid.files.wordpress.com/2014/01/27.png?w=300&h=188" width="300" /></a></div><div style="text-align: justify;">Secara lengkap kode pada kelas CobaDua menjadi seperti ini:</div><div><div class="syntaxhighlighter java" id="highlighter_505344"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td class="gutter"><div class="line number1 index0 alt2">1</div><div class="line number2 index1 alt1">2</div><div class="line number3 index2 alt2">3</div><div class="line number4 index3 alt1">4</div><div class="line number5 index4 alt2">5</div><div class="line number6 index5 alt1">6</div><div class="line number7 index6 alt2">7</div><div class="line number8 index7 alt1">8</div><div class="line number9 index8 alt2">9</div><div class="line number10 index9 alt1">10</div><div class="line number11 index10 alt2">11</div><div class="line number12 index11 alt1">12</div><div class="line number13 index12 alt2">13</div><div class="line number14 index13 alt1">14</div><div class="line number15 index14 alt2">15</div><div class="line number16 index15 alt1">16</div><div class="line number17 index16 alt2">17</div><div class="line number18 index17 alt1">18</div></td><td class="code"><div class="container"><div class="line number1 index0 alt2"><code class="java keyword">package</code> <code class="java plain">id.co.firman;</code></div><div class="line number2 index1 alt1"> </div><div class="line number3 index2 alt2"><code class="java keyword">public</code> <code class="java keyword">class</code> <code class="java plain">CobaDua {</code></div><div class="line number4 index3 alt1"><code class="java spaces">    </code><code class="java keyword">private</code> <code class="java plain">String nama;</code></div><div class="line number5 index4 alt2"><code class="java spaces">    </code><code class="java keyword">private</code> <code class="java plain">String alamat;</code></div><div class="line number6 index5 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java plain">String getNama() {</code></div><div class="line number7 index6 alt2"><code class="java spaces">        </code><code class="java keyword">return</code> <code class="java plain">nama;</code></div><div class="line number8 index7 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number9 index8 alt2"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">void</code> <code class="java plain">setNama(String nama) {</code></div><div class="line number10 index9 alt1"><code class="java spaces">        </code><code class="java keyword">this</code><code class="java plain">.nama = nama;</code></div><div class="line number11 index10 alt2"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number12 index11 alt1"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java plain">String getAlamat() {</code></div><div class="line number13 index12 alt2"><code class="java spaces">        </code><code class="java keyword">return</code> <code class="java plain">alamat;</code></div><div class="line number14 index13 alt1"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number15 index14 alt2"><code class="java spaces">    </code><code class="java keyword">public</code> <code class="java keyword">void</code> <code class="java plain">setAlamat(String alamat) {</code></div><div class="line number16 index15 alt1"><code class="java spaces">        </code><code class="java keyword">this</code><code class="java plain">.alamat = alamat;</code></div><div class="line number17 index16 alt2"><code class="java spaces">    </code><code class="java plain">}</code></div><div class="line number18 index17 alt1"><code class="java plain">}</code></div></div></td></tr></tbody></table></div></div><div style="text-align: justify;">Dengan cara ini kita tidak perlu menuliskan method getter dan setter secara manual. Eclipse sudah cukup pintar untuk membuatkan getter dan setter ini. Kita cukup memodifikasi method-method ini bila perlu.</div></p>

Pada tulisan ini dibahas beberapa hal mendasar yang saya rasa penting diketahui dalam penggunaan Eclipse untuk membangun aplikasi Java. Be...