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<h1 class="page">jMonkeyEngine SDK: Creating Projects</h1>
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>The jMonkeyEngine SDK makes it easy to get started with developing 3-D games based on the jMonkeyEngine.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="creating-a-new-jmonkeyengine-project"><a class="anchor" href="#creating-a-new-jmonkeyengine-project"></a>Creating a New jMonkeyEngine Project</h2>
<div class="sectionbody">
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Choose <code><span class="menuseq"><b class="menu">File</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="menuitem">New Project</b></span></code> from the main menu.</p>
</li>
<li>
<p>In the New Project Wizard, select the template <code><span class="menuseq"><b class="menu">JME3</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="menuitem">Basic Game</b></span></code>.</p>
</li>
<li>
<p>Click next to specify a project name, and the path where to store your new project.</p>
</li>
<li>
<p>Click Finish. A skeleton application is created and opens in the Project Explorer.</p>
<div class="ulist">
<ul>
<li>
<p>This basic jme3 application is based on the SimpleApplication class to allow an easy start with jme3.</p>
</li>
<li>
<p>You can click the run button to run it: You will see a blue cube.</p>
</li>
</ul>
</div>
</li>
</ol>
</div>
<div class="sect2">
<h3 id="project-structure"><a class="anchor" href="#project-structure"></a>Project Structure</h3>
<div class="imageblock text-center">
<div class="content">
<img src="../_images/sdk/jmonkeyplatform-docu-4.png" alt="jmonkeyplatform-docu-4.png" width="421" height="298">
</div>
</div>
<div class="paragraph">
<p>Let&#8217;s have a look at the abstract project structure in the Project Explorer. (<kbd>Ctrl</kbd>+<kbd>1</kbd>).</p>
</div>
<div class="ulist">
<ul>
<li>
<p><strong>Project Assets node:</strong> These directories have been created for you to store your games assets, such as fonts, materials, models, shaders, sounds, and textures. For a newly created project, these directories are empty.</p>
</li>
<li>
<p><strong>Source Packages node:</strong> This is where you manage your packages and classes. For a newly created project, it contains one package and one class, <code>Main.java</code>. Double click <code>Main.java</code> to open it in the editor.</p>
</li>
<li>
<p><strong>Libraries node:</strong> An overview of all libraies on your game&#8217;s classpath. The classpath is already set-up for the jme3 framework (including LWJGL, Bullet, Nifty <abbr title="Graphical User Interface">GUI</abbr>, etc).</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="directory-structure"><a class="anchor" href="#directory-structure"></a>Directory Structure</h3>
<div class="paragraph">
<p>Now let&#8217;s have a look at the project&#8217;s file structure in the File Explorer (<kbd>Ctrl</kbd>+<kbd>2</kbd>). This explorer shows the physical directory structure on your hard drive.</p>
</div>
<div class="ulist">
<ul>
<li>
<p><strong>assets</strong> – This directory corresponds to the Project Assets node. It is needed for the assetManager.</p>
<div class="paragraph">
<p>This is the recommended internal structure:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>assets/Interface</code></p>
</li>
<li>
<p><code>assets/MatDefs</code></p>
</li>
<li>
<p><code>assets/Materials</code></p>
</li>
<li>
<p><code>assets/Models</code></p>
</li>
<li>
<p><code>assets/Scenes</code></p>
</li>
<li>
<p><code>assets/Shaders</code></p>
</li>
<li>
<p><code>assets/Sounds</code></p>
</li>
<li>
<p><code>assets/Textures</code></p>
</li>
</ul>
</div>
</li>
<li>
<p><strong>src</strong> – This directory corresponds to the Source Packages node. Your sources code goes here.</p>
</li>
<li>
<p><strong>nbproject</strong> – This is meta data used by the jMonkeyEngine SDK (don&#8217;t edit).</p>
</li>
<li>
<p><strong>build.xml</strong> – This is an Ant build script that is hooked up to the clean/build/run/test actions in the jMonkeyEngine SDK. It loads a default build script, and allows you to further customize the build process. The Ant script also assures that you are able to clean/build/run/test your application outside of the jMonkeyEngine SDK – e.g. from the command line.</p>
</li>
<li>
<p><strong>build</strong> – This directory contains the compiled classes. (Will be generated by the jMonkeyEngine SDK when you build the project.)</p>
</li>
<li>
<p><strong>dist</strong> – This directory contains the executable JAR files. (Will be generated by the jMonkeyEngine SDK when you build the project.)</p>
</li>
<li>
<p><strong>test</strong> – The jMonkeyEngine SDK will store JUnit tests here if you create any. (Optional.)</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="project-configuration"><a class="anchor" href="#project-configuration"></a>Project Configuration</h3>
<div class="paragraph">
<p>[RMB] select the project and from the menu open the project <code>Properties</code>.</p>
</div>
<div class="ulist">
<ul>
<li>
<p>In the <code>Run</code> section:</p>
<div class="ulist">
<ul>
<li>
<p>Specify the main class of your project. (Pressing <kbd>F6</kbd> runs this main class.)</p>
</li>
<li>
<p>You can optionally configure JVM options and command line parameters. In most cases, set the <code>-Xms VMOption [NUMBER] m</code> for the memory usage.</p>
<div class="ulist">
<ul>
<li>
<p>For example (-Xms500m).</p>
</li>
<li>
<p>see <a href="http://performance.netbeans.org/howto/jvmswitches/">http://performance.netbeans.org/howto/jvmswitches/</a>).</p>
</li>
</ul>
</div>
</li>
</ul>
</div>
</li>
<li>
<p>In the Application section:</p>
<div class="ulist">
<ul>
<li>
<p>Specify the game title (by default the game will be named <code>BasicGame</code>).</p>
</li>
<li>
<p>Specify the vendor name (your name), a short description, your project&#8217;s homepage, and a splash screen.</p>
</li>
</ul>
</div>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="clean-build-and-run-cycle"><a class="anchor" href="#clean-build-and-run-cycle"></a>Clean, Build and Run Cycle</h3>
<div class="imageblock text-center">
<div class="content">
<img src="../_images/sdk/jmonkeyplatform-docu-5.png" alt="jmonkeyplatform-docu-5.png" width="421" height="298">
</div>
</div>
<div class="admonitionblock important">
<table>
<tr>
<td class="icon">
<i class="fa icon-important" title="Important"></i>
</td>
<td class="content">
<div class="paragraph">
<p>Pressing <strong><kbd>F6</kbd> builds &amp; runs</strong> the <em>main</em> class of the <em>main project</em>. If there are several classes, or several projects, you have to specify which one you want <kbd>F6</kbd> to run. <b class="button">RMB</b> select a project and choose <code>Set As Main Project</code>, then <b class="button">RMB</b> select the project again and choose <code><span class="menuseq"><b class="menu">Properties</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="menuitem">Run</b></span></code> and choose a Main Class.</p>
</div>
<div class="paragraph">
<p>To build and run the main() of <em>any file that is open in the editor</em>, press <kbd>Shift</kbd>+<kbd>F6</kbd>!</p>
</div>
</td>
</tr>
</table>
</div>
<div class="ulist">
<ul>
<li>
<p><b class="button">RMB</b> select the project and use the context-menu to clean all generated classes and JARs.</p>
</li>
<li>
<p><b class="button">RMB</b> select individual files with a main method to build and run them. (<kbd>Shift</kbd>+<kbd>F6</kbd>)</p>
</li>
<li>
<p>Press the <b class="button">Run</b> button (green arrow in the toolbar) to build and run the project. (<kbd>F6</kbd>)</p>
</li>
</ul>
</div>
<div class="paragraph">
<p><strong>More than one project open?</strong> The toolbar buttons and the F-keys are bound to the main project, which is shown in bold in the Project Explorer. <b class="button">RMB</b> select a project and select <code>Set As Main Project</code> to make it respond to the toolbar buttons and F-keys.</p>
</div>
<div class="paragraph">
<p><strong>Worried About Proprietary Lock-in?</strong> You are never locked into the jMonkeyEngine SDK: At any time, you can change into your project directory on the command line, and clean, build, and run your project, using non-proprietary Apache Ant commands:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code>ant clean; ant jar; ant run;</code></pre>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="development-process"><a class="anchor" href="#development-process"></a>Development Process</h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p><strong>Creating new files and packages:</strong> Select the Source Packages node (or any of its subnodes), and press <kbd>Ctrl</kbd>+<kbd>N</kbd> (<code><span class="menuseq"><b class="menu">File</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="menuitem">New File</b></span></code>): Use the <code>New File</code> wizard to create new Java classes, Java packages, Java beans, Swing forms, JUnit files, j3m Materials, j3o scenes, j3f filters, and many more.</p>
</li>
<li>
<p><strong>Editing files:</strong> Open the Projects Explorer and double-click a Java file from the Source Packages to open it in the Editor. The <a href="code_editor.html" class="page">jMonkeyEngine SDK Code Editor</a> assists you in many ways, including syntactic and semantic code coloring, code completion, and javadoc.</p>
</li>
<li>
<p><strong>Adding Assets:</strong></p>
<div class="ulist">
<ul>
<li>
<p>You can <a href="model_loader_and_viewer.html" class="page">import models, scenes, and materials</a> as assets into your project.</p>
</li>
<li>
<p>To add sound files and images, use your operating system&#8217;s file explorer and copy the files into your project&#8217;s asset directory.</p>
</li>
</ul>
</div>
</li>
<li>
<p><strong>ToDo List:</strong> The tasks window automatically lists all lines containing errors and warnings, and all lines that you have marked with the comment keywords</p>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-html hljs" data-lang="html">FIXME</code></pre>
</div>
</div>
<div class="paragraph">
<p>, @todo, or TODO.</p>
</div>
</li>
<li>
<p><strong>Integrated tools:</strong> <a href="debugging_profiling_testing.html" class="page">Debugging, Testing, Profiling</a>.</p>
</li>
</ul>
</div>
<div class="sect2">
<h3 id="adding-external-jar-libraries"><a class="anchor" href="#adding-external-jar-libraries"></a>Adding external jar libraries</h3>
<div class="paragraph">
<p>You may want to use external Java libraries in your jME project, for example content generators or artificial intelligence implementations.</p>
</div>
<div class="paragraph">
<p>Add the library to the global library list:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Select <span class="menuseq"><b class="menu">Tools</b>&#160;<i class="fa fa-angle-right caret"></i> <b class="menuitem">Libraries</b></span> in the main menu.</p>
</li>
<li>
<p>Click &#8220;New Library&#8221;, enter a name for the library, and press <b class="button">OK</b>.</p>
</li>
<li>
<p>In the &#8220;Classpath&#8221; tab, press &#8220;Add JAR/Folder&#8221; and select the jar file(s) needed for the library.</p>
</li>
<li>
<p>(Optional) In the &#8220;JavaDoc&#8221; tab, press &#8220;Add ZIP/Folder&#8221; and select the javadoc for the library, as zip file or folder.</p>
</li>
<li>
<p>(Optional) In the &#8220;Sources&#8221; tab you can select a folder or jar file containing the source files of the library.</p>
</li>
<li>
<p>Press <b class="button">OK</b>.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Add the library to a project:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><b class="button">RMB</b> select your project and select &#8220;Properties&#8221;.</p>
</li>
<li>
<p>Select &#8220;Libaries&#8221; on the left and then press &#8220;Add Library&#8221;.</p>
</li>
<li>
<p>Select the library from the list and press <b class="button">OK</b>.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>That&#8217;s it, your project can now use the external library. If you also linked the javadoc and sources, the SDK will assist you with javadoc popups, code completion (<kbd>Ctrl</kbd>+<kbd>Space</kbd>) and source navigation (<kbd>Ctrl</kbd>+<b class="button">LMB</b> ).</p>
</div>
</div>
<div class="sect2">
<h3 id="application-deployment"><a class="anchor" href="#application-deployment"></a>Application Deployment</h3>
<div class="ulist">
<ul>
<li>
<p>You can <a href="application_deployment.html" class="page">deploy</a> your game as desktop application (JAR), browser applet, WebStart (JNLP), or on the Android platform.</p>
</li>
</ul>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="running-sample-projects"><a class="anchor" href="#running-sample-projects"></a>Running Sample Projects</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The SDK contains <a href="sample_code.html" class="page">Sample Code</a> (read more).</p>
</div>
<div class="paragraph">
<p>Open the Source Packages node of the JmeTests project.</p>
</div>
<div class="ulist">
<ul>
<li>
<p><b class="button">RMB</b> select the <code>JME3Tests</code> project and choose Run.<br>
Choose samples from the TestChooser and try out the included demos.</p>
</li>
<li>
<p>Browse a demo&#8217;s source code in the SDK&#8217;s Project window to learn how a feature is implemented and used.</p>
</li>
<li>
<p>Feel free to modify the code samples and experiment! If you break something, you can always recreate the packaged samples from the <code>JME3 Tests</code> template.</p>
</li>
</ul>
</div>
</div>
</div>
</article>
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