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<div class="section" id="run-mxnet-scala-examples-using-the-intellij-ide-macos">
<span id="run-mxnet-scala-examples-using-the-intellij-ide-macos"></span><h1>Run MXNet Scala Examples Using the IntelliJ IDE (macOS)<a class="headerlink" href="#run-mxnet-scala-examples-using-the-intellij-ide-macos" title="Permalink to this headline"></a></h1>
<p>This tutorial guides you through setting up a Scala project in the IntelliJ IDE on macOS, and shows how to use the MXNet package from your application.</p>
<div class="section" id="prerequisites">
<span id="prerequisites"></span><h2>Prerequisites:<a class="headerlink" href="#prerequisites" title="Permalink to this headline"></a></h2>
<p>To use this tutorial you need the following software:</p>
<ul class="simple">
<li><a class="reference external" href="http://www.oracle.com/technetwork/java/javase/downloads/index.html">Java 8 JDK</a></li>
<li><a class="reference external" href="https://maven.apache.org/install.html">Maven</a></li>
<li><a class="reference external" href="https://www.scala-lang.org/download/">Scala</a> - comes with IntelliJ, so you don’t need to install it separately</li>
<li><a class="reference external" href="https://opencv.org/">OpenCV</a></li>
<li><a class="reference external" href="https://www.jetbrains.com/idea/">IntelliJ IDE</a></li>
</ul>
<p>The following instructions are provided for macOS and Ubuntu 16.04. Windows support is not yet available.</p>
<div class="section" id="mac-prerequisites-setup">
<span id="mac-prerequisites-setup"></span><h3>Mac Prerequisites Setup<a class="headerlink" href="#mac-prerequisites-setup" title="Permalink to this headline"></a></h3>
<p><strong>Step 1.</strong> Install brew:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="o">/</span><span class="n">usr</span><span class="o">/</span><span class="nb">bin</span><span class="o">/</span><span class="n">ruby</span> <span class="o">-</span><span class="n">e</span> <span class="s2">"$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"</span>
</pre></div>
</div>
<p>Or, if you already have brew, update it:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">brew</span> <span class="n">update</span>
</pre></div>
</div>
<p><strong>Step 2.</strong> Install Java 8 JDK:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">brew</span> <span class="n">tap</span> <span class="n">caskroom</span><span class="o">/</span><span class="n">versions</span>
<span class="n">brew</span> <span class="n">cask</span> <span class="n">install</span> <span class="n">java8</span>
</pre></div>
</div>
<p><strong>Step 3.</strong> Install maven:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">brew</span> <span class="n">install</span> <span class="n">maven</span>
</pre></div>
</div>
<p><strong>Step 4.</strong> Install OpenCV:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">brew</span> <span class="n">install</span> <span class="n">opencv</span><span class="nd">@2</span>
</pre></div>
</div>
</div>
<div class="section" id="ubuntu-prerequisites-setup">
<span id="ubuntu-prerequisites-setup"></span><h3>Ubuntu Prerequisites Setup<a class="headerlink" href="#ubuntu-prerequisites-setup" title="Permalink to this headline"></a></h3>
<p><strong>Step 1.</strong>: Download the MXNet source.</p>
<div class="highlight-bash"><div class="highlight"><pre><span></span>git clone --recursive https://github.com/apache/incubator-mxnet.git mxnet
<span class="nb">cd</span> mxnet
</pre></div>
</div>
<p><strong>Step 2.</strong>: Run the dependency installation scripts.</p>
<div class="highlight-bash"><div class="highlight"><pre><span></span>sudo ./ci/docker/install/ubuntu_core.sh
sudo ./ci/docker/install/ubuntu_scala.sh
</pre></div>
</div>
</div>
</div>
<div class="section" id="access-the-maven-package-for-mxnet">
<span id="access-the-maven-package-for-mxnet"></span><h2>Access the Maven Package for MXNet<a class="headerlink" href="#access-the-maven-package-for-mxnet" title="Permalink to this headline"></a></h2>
<p>To view the latest Maven packages, you can check the Maven repository for the <code class="docutils literal"><span class="pre">org.apache.mxnet</span></code> packages.</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference external" href="https://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.apache.mxnet%22">MXNet Maven Packages</a></li>
</ul>
</div>
<p>In the tutorial below, you will install the latest package at the time of this writing. You may find a different artifact for your specific operating system, or a newer one by reviewing what is currently available in the Maven repo.</p>
<p>The configuration you should update is in the pom file’s dependency for MXNet:</p>
<div class="highlight-html"><div class="highlight"><pre><span></span><span class="p"><</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>org.apache.mxnet<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>mxnet-full_2.11-osx-x86_64-cpu<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>1.2.0<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"></</span><span class="nt">dependency</span><span class="p">></span>
</pre></div>
</div>
</div>
<div class="section" id="set-up-your-project">
<span id="set-up-your-project"></span><h2>Set Up Your Project<a class="headerlink" href="#set-up-your-project" title="Permalink to this headline"></a></h2>
<p>Now that you’ve installed your prerequisites, you are ready to setup IntelliJ and your first MXNet-Scala project!</p>
<p><strong>Step 1.</strong> Install and setup IntelliJ:
- When prompted for what to features to enable during IntelliJ’s first startup, make sure you select Scala.</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="o">-</span> <span class="n">Install</span> <span class="n">the</span> <span class="n">plugin</span> <span class="k">for</span> <span class="n">IntelliJ</span> <span class="n">IDE</span> <span class="n">by</span> <span class="n">following</span> <span class="n">these</span> <span class="n">steps</span><span class="p">:</span>
</pre></div>
</div>
<p>On <strong>Menu</strong>, choose <strong>Preferences</strong>, choose <strong>Plugins</strong>, type <strong>Scala</strong>, and then choose <strong>Install</strong>. For further plugin help and instructions, refer to <a class="reference external" href="https://www.jetbrains.com/help/idea/scala.html">Scala plugin setup for IDE</a>.</p>
<p><strong>Step 2.</strong> Create a new project:</p>
<p><img alt="intellij welcome" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-welcome.png"/></p>
<p>From the IntelliJ welcome screen, select “Create New Project”.</p>
<p><img alt="maven project type" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-type.png"/></p>
<p>Choose the Maven project type.</p>
<p><img alt="maven project type - archetype" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-type-archetype-check.png"/></p>
<p>Select the checkbox for <code class="docutils literal"><span class="pre">Create</span> <span class="pre">from</span> <span class="pre">archetype</span></code>.</p>
<p><img alt="maven project type - archetype" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-type-archetype-add.png"/></p>
<p>Click the <code class="docutils literal"><span class="pre">Add</span> <span class="pre">Archetype</span></code> button, and add the following information to each field.</p>
<p><strong>GroupId</strong></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">net</span><span class="o">.</span><span class="n">alchim31</span><span class="o">.</span><span class="n">maven</span>
</pre></div>
</div>
<p><strong>ArtifactId</strong></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">scala</span><span class="o">-</span><span class="n">archetype</span><span class="o">-</span><span class="n">simple</span>
</pre></div>
</div>
<p><strong>Version</strong></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="mf">1.6.0</span>
</pre></div>
</div>
<p><strong>Repository</strong></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">https</span><span class="p">:</span><span class="o">//</span><span class="n">mvnrepository</span><span class="o">.</span><span class="n">com</span><span class="o">/</span><span class="n">artifact</span><span class="o">/</span><span class="n">net</span><span class="o">.</span><span class="n">alchim31</span><span class="o">.</span><span class="n">maven</span><span class="o">/</span><span class="n">scala</span><span class="o">-</span><span class="n">archetype</span><span class="o">-</span><span class="n">simple</span>
</pre></div>
</div>
<p><img alt="maven project type - archetype" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-type-archetype-add-confirm.png"/></p>
<p>Click <code class="docutils literal"><span class="pre">Ok</span></code> to add the archetype, make sure it is selected from the list, and then click <code class="docutils literal"><span class="pre">Next</span></code>.</p>
<p><img alt="project metadata" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-metadata.png"/></p>
<p>Set the project’s metadata. For this tutorial, use the following:</p>
<p><strong>GroupId</strong></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">mxnet</span>
</pre></div>
</div>
<p><strong>ArtifactId</strong></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">ArtifactId</span><span class="p">:</span> <span class="n">scalaMXNet</span>
</pre></div>
</div>
<p><strong>Version</strong></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="mf">1.0</span><span class="o">-</span><span class="n">SNAPSHOT</span>
</pre></div>
</div>
<p><img alt="project properties" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-properties.png"/></p>
<p>Review the project’s properties. The settings can be left as their default.</p>
<p><img alt="project location" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-location.png"/></p>
<p>Set the project’s location. The rest of the settings can be left as their default.</p>
<p><img alt="project 1" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-1.png"/></p>
<p>After clicking Finish, you will be presented with the project’s first view.
The project’s <code class="docutils literal"><span class="pre">pom.xml</span></code> will be open for editing.</p>
<p><strong>Step 3.</strong> Replace the pom file’s content with the following code. Changes include:</p>
<ul class="simple">
<li>Project properties: <code class="docutils literal"><span class="pre">scala.version</span></code>, upgrading from <code class="docutils literal"><span class="pre">2.11.5</span></code> to <code class="docutils literal"><span class="pre">2.11.8</span></code></li>
<li>Project dependencies: adding the MXNet package from Maven and updating the dependency for JUnitRunner (specs2-junit_)</li>
<li>Build options: removing ‘-make:transitive’</li>
</ul>
<div class="highlight-html"><div class="highlight"><pre><span></span><span class="p"><</span><span class="nt">project</span> <span class="na">xmlns</span><span class="o">=</span><span class="s">"http://maven.apache.org/POM/4.0.0"</span> <span class="na">xmlns:xsi</span><span class="o">=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span> <span class="na">xsi:schemaLocation</span><span class="o">=</span><span class="s">"http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"</span><span class="p">></span>
<span class="p"><</span><span class="nt">modelVersion</span><span class="p">></span>4.0.0<span class="p"></</span><span class="nt">modelVersion</span><span class="p">></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>mxnet<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>scalaMXNet<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>1.0-SNAPSHOT<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"><</span><span class="nt">name</span><span class="p">></span>${project.artifactId}<span class="p"></</span><span class="nt">name</span><span class="p">></span>
<span class="p"><</span><span class="nt">description</span><span class="p">></span>My wonderful scala app<span class="p"></</span><span class="nt">description</span><span class="p">></span>
<span class="p"><</span><span class="nt">inceptionYear</span><span class="p">></span>2018<span class="p"></</span><span class="nt">inceptionYear</span><span class="p">></span>
<span class="p"><</span><span class="nt">licenses</span><span class="p">></span>
<span class="p"><</span><span class="nt">license</span><span class="p">></span>
<span class="p"><</span><span class="nt">name</span><span class="p">></span>Apache2<span class="p"></</span><span class="nt">name</span><span class="p">></span>
<span class="p"><</span><span class="nt">url</span><span class="p">></span>http://mxnet.apache.org<span class="p"></</span><span class="nt">url</span><span class="p">></span>
<span class="p"><</span><span class="nt">distribution</span><span class="p">></span>repo<span class="p"></</span><span class="nt">distribution</span><span class="p">></span>
<span class="p"></</span><span class="nt">license</span><span class="p">></span>
<span class="p"></</span><span class="nt">licenses</span><span class="p">></span>
<span class="p"><</span><span class="nt">profiles</span><span class="p">></span>
<span class="p"><</span><span class="nt">profile</span><span class="p">></span>
<span class="p"><</span><span class="nt">id</span><span class="p">></span>osx-x86_64-cpu<span class="p"></</span><span class="nt">id</span><span class="p">></span>
<span class="p"><</span><span class="nt">properties</span><span class="p">></span>
<span class="p"><</span><span class="nt">platform</span><span class="p">></span>osx-x86_64-cpu<span class="p"></</span><span class="nt">platform</span><span class="p">></span>
<span class="p"></</span><span class="nt">properties</span><span class="p">></span>
<span class="p"></</span><span class="nt">profile</span><span class="p">></span>
<span class="p"><</span><span class="nt">profile</span><span class="p">></span>
<span class="p"><</span><span class="nt">id</span><span class="p">></span>linux-x86_64-cpu<span class="p"></</span><span class="nt">id</span><span class="p">></span>
<span class="p"><</span><span class="nt">properties</span><span class="p">></span>
<span class="p"><</span><span class="nt">platform</span><span class="p">></span>linux-x86_64-cpu<span class="p"></</span><span class="nt">platform</span><span class="p">></span>
<span class="p"></</span><span class="nt">properties</span><span class="p">></span>
<span class="p"></</span><span class="nt">profile</span><span class="p">></span>
<span class="p"><</span><span class="nt">profile</span><span class="p">></span>
<span class="p"><</span><span class="nt">id</span><span class="p">></span>linux-x86_64-gpu<span class="p"></</span><span class="nt">id</span><span class="p">></span>
<span class="p"><</span><span class="nt">properties</span><span class="p">></span>
<span class="p"><</span><span class="nt">platform</span><span class="p">></span>linux-x86_64-gpu<span class="p"></</span><span class="nt">platform</span><span class="p">></span>
<span class="p"></</span><span class="nt">properties</span><span class="p">></span>
<span class="p"></</span><span class="nt">profile</span><span class="p">></span>
<span class="p"></</span><span class="nt">profiles</span><span class="p">></span>
<span class="p"><</span><span class="nt">properties</span><span class="p">></span>
<span class="p"><</span><span class="nt">maven.compiler.source</span><span class="p">></span>1.6.0<span class="p"></</span><span class="nt">maven.compiler.source</span><span class="p">></span>
<span class="p"><</span><span class="nt">maven.compiler.target</span><span class="p">></span>1.6.0<span class="p"></</span><span class="nt">maven.compiler.target</span><span class="p">></span>
<span class="p"><</span><span class="nt">encoding</span><span class="p">></span>UTF-8<span class="p"></</span><span class="nt">encoding</span><span class="p">></span>
<span class="p"><</span><span class="nt">scala.version</span><span class="p">></span>2.11.8<span class="p"></</span><span class="nt">scala.version</span><span class="p">></span>
<span class="p"><</span><span class="nt">scala.compat.version</span><span class="p">></span>2.11<span class="p"></</span><span class="nt">scala.compat.version</span><span class="p">></span>
<span class="p"></</span><span class="nt">properties</span><span class="p">></span>
<span class="p"><</span><span class="nt">dependencies</span><span class="p">></span>
<span class="p"><</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>org.apache.mxnet<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>mxnet-full_2.11-osx-x86_64-cpu<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>1.2.0<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"></</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>org.scala-lang<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>scala-library<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>${scala.version}<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"></</span><span class="nt">dependency</span><span class="p">></span>
<span class="c"><!-- Test --></span>
<span class="p"><</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>junit<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>junit<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>4.11<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"><</span><span class="nt">scope</span><span class="p">></span>test<span class="p"></</span><span class="nt">scope</span><span class="p">></span>
<span class="p"></</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>org.specs2<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>specs2-junit_${scala.compat.version}<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>2.4.16<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"><</span><span class="nt">scope</span><span class="p">></span>test<span class="p"></</span><span class="nt">scope</span><span class="p">></span>
<span class="p"></</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>org.scalatest<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>scalatest_${scala.compat.version}<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>2.2.4<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"><</span><span class="nt">scope</span><span class="p">></span>test<span class="p"></</span><span class="nt">scope</span><span class="p">></span>
<span class="p"></</span><span class="nt">dependency</span><span class="p">></span>
<span class="p"></</span><span class="nt">dependencies</span><span class="p">></span>
<span class="p"><</span><span class="nt">build</span><span class="p">></span>
<span class="p"><</span><span class="nt">sourceDirectory</span><span class="p">></span>src/main/scala<span class="p"></</span><span class="nt">sourceDirectory</span><span class="p">></span>
<span class="p"><</span><span class="nt">testSourceDirectory</span><span class="p">></span>src/test/scala<span class="p"></</span><span class="nt">testSourceDirectory</span><span class="p">></span>
<span class="p"><</span><span class="nt">plugins</span><span class="p">></span>
<span class="p"><</span><span class="nt">plugin</span><span class="p">></span>
<span class="c"><!-- see http://davidb.github.com/scala-maven-plugin --></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>net.alchim31.maven<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>scala-maven-plugin<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>3.2.0<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"><</span><span class="nt">executions</span><span class="p">></span>
<span class="p"><</span><span class="nt">execution</span><span class="p">></span>
<span class="p"><</span><span class="nt">goals</span><span class="p">></span>
<span class="p"><</span><span class="nt">goal</span><span class="p">></span>compile<span class="p"></</span><span class="nt">goal</span><span class="p">></span>
<span class="p"><</span><span class="nt">goal</span><span class="p">></span>testCompile<span class="p"></</span><span class="nt">goal</span><span class="p">></span>
<span class="p"></</span><span class="nt">goals</span><span class="p">></span>
<span class="p"><</span><span class="nt">configuration</span><span class="p">></span>
<span class="p"><</span><span class="nt">args</span><span class="p">></span>
<span class="c"><!--arg>-make:transitive</arg--></span>
<span class="p"><</span><span class="nt">arg</span><span class="p">></span>-dependencyfile<span class="p"></</span><span class="nt">arg</span><span class="p">></span>
<span class="p"><</span><span class="nt">arg</span><span class="p">></span>${project.build.directory}/.scala_dependencies<span class="p"></</span><span class="nt">arg</span><span class="p">></span>
<span class="p"></</span><span class="nt">args</span><span class="p">></span>
<span class="p"></</span><span class="nt">configuration</span><span class="p">></span>
<span class="p"></</span><span class="nt">execution</span><span class="p">></span>
<span class="p"></</span><span class="nt">executions</span><span class="p">></span>
<span class="p"></</span><span class="nt">plugin</span><span class="p">></span>
<span class="p"><</span><span class="nt">plugin</span><span class="p">></span>
<span class="p"><</span><span class="nt">groupId</span><span class="p">></span>org.apache.maven.plugins<span class="p"></</span><span class="nt">groupId</span><span class="p">></span>
<span class="p"><</span><span class="nt">artifactId</span><span class="p">></span>maven-surefire-plugin<span class="p"></</span><span class="nt">artifactId</span><span class="p">></span>
<span class="p"><</span><span class="nt">version</span><span class="p">></span>2.18.1<span class="p"></</span><span class="nt">version</span><span class="p">></span>
<span class="p"><</span><span class="nt">configuration</span><span class="p">></span>
<span class="p"><</span><span class="nt">useFile</span><span class="p">></span>false<span class="p"></</span><span class="nt">useFile</span><span class="p">></span>
<span class="p"><</span><span class="nt">disableXmlReport</span><span class="p">></span>true<span class="p"></</span><span class="nt">disableXmlReport</span><span class="p">></span>
<span class="c"><!-- If you have classpath issue like NoDefClassError,... --></span>
<span class="c"><!-- useManifestOnlyJar>false</useManifestOnlyJar --></span>
<span class="p"><</span><span class="nt">includes</span><span class="p">></span>
<span class="p"><</span><span class="nt">include</span><span class="p">></span>**/*Test.*<span class="p"></</span><span class="nt">include</span><span class="p">></span>
<span class="p"><</span><span class="nt">include</span><span class="p">></span>**/*Suite.*<span class="p"></</span><span class="nt">include</span><span class="p">></span>
<span class="p"></</span><span class="nt">includes</span><span class="p">></span>
<span class="p"></</span><span class="nt">configuration</span><span class="p">></span>
<span class="p"></</span><span class="nt">plugin</span><span class="p">></span>
<span class="p"></</span><span class="nt">plugins</span><span class="p">></span>
<span class="p"></</span><span class="nt">build</span><span class="p">></span>
<span class="p"></</span><span class="nt">project</span><span class="p">></span>
</pre></div>
</div>
<p><strong>Step 4.</strong> Import dependencies with Maven:</p>
<ul class="simple">
<li>Note the prompt in the lower right corner that states “Maven projects need to be imported”. If this is not visible, click on the little greed balloon that appears in the lower right corner.</li>
</ul>
<p><img alt="import dependencies" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-import-changes.gif"/></p>
<p>Click “Import Changes” in this prompt.</p>
<p><strong>Step 5.</strong> Build the project:</p>
<ul class="simple">
<li>To build the project, from the menu choose Build, and then choose Build Project.</li>
</ul>
<p><strong>Step 6.</strong> Run the Hello World App:</p>
<p><img alt="hello world app" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-hello-world-app.png"/></p>
<p>Navigate to the App included with the project.</p>
<p><img alt="run hello world" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-hello-world-run.png"/></p>
<p>Run the App by clicking the green arrow, and verify the Hello World output</p>
<p><strong>Step 7.</strong> Run Sample MXNet Code in the App:</p>
<p><img alt="run hello mxnet" src="https://raw.githubusercontent.com/dmlc/web-data/master/mxnet/scala/intellij-project-hello-mxnet.png"/></p>
<p>Paste the following code in the App, overwriting the original hello world code. Then click the green arrow to run it.</p>
<div class="highlight-scala"><div class="highlight"><pre><span></span><span class="k">object</span> <span class="nc">App</span> <span class="k">extends</span> <span class="nc">App</span> <span class="o">{</span>
<span class="k">import</span> <span class="nn">org.apache.mxnet._</span>
<span class="k">private</span> <span class="k">val</span> <span class="n">a</span> <span class="k">=</span> <span class="nc">NDArray</span><span class="o">.</span><span class="n">ones</span><span class="o">(</span><span class="mi">2</span><span class="o">,</span> <span class="mi">3</span><span class="o">)</span>
<span class="n">println</span><span class="o">(</span><span class="s">"Testing MXNet by generating an 2x3 NDArray..."</span><span class="o">)</span>
<span class="n">println</span><span class="o">(</span><span class="s">"Shape is: "</span><span class="o">)</span>
<span class="n">println</span><span class="o">(</span><span class="n">a</span><span class="o">.</span><span class="n">shape</span><span class="o">)</span>
<span class="o">}</span>
</pre></div>
</div>
<p>The result should be this output:</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">Testing</span> <span class="n">MXNet</span> <span class="n">by</span> <span class="n">generating</span> <span class="n">an</span> <span class="mi">2</span><span class="n">x3</span> <span class="n">NDArray</span><span class="o">...</span>
<span class="n">Shape</span> <span class="ow">is</span><span class="p">:</span>
<span class="p">(</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">)</span>
<span class="n">Process</span> <span class="n">finished</span> <span class="k">with</span> <span class="n">exit</span> <span class="n">code</span> <span class="mi">0</span>
</pre></div>
</div>
<div class="section" id="troubleshooting">
<span id="troubleshooting"></span><h3>Troubleshooting<a class="headerlink" href="#troubleshooting" title="Permalink to this headline"></a></h3>
<p>If you get an error, check the dependencies at the beginning of this tutorial. For example, you might see the following in the middle of the error messages.</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="o">...</span>
<span class="n">Library</span> <span class="ow">not</span> <span class="n">loaded</span><span class="p">:</span> <span class="o">/</span><span class="n">usr</span><span class="o">/</span><span class="n">local</span><span class="o">/</span><span class="n">opt</span><span class="o">/</span><span class="n">opencv</span><span class="nd">@2</span><span class="o">/</span><span class="n">lib</span><span class="o">/</span><span class="n">libopencv_calib3d</span><span class="o">.</span><span class="mf">2.4</span><span class="o">.</span><span class="n">dylib</span>
<span class="o">...</span>
</pre></div>
</div>
<p>This can be resolved be installing OpenCV2.</p>
</div>
<div class="section" id="troubleshooting">
<span id="id1"></span><h3>Troubleshooting<a class="headerlink" href="#troubleshooting" title="Permalink to this headline"></a></h3>
<p>If you get an error, check if it is like this one regarding OpenCV. For example, you might see the following in the middle of the error messages.</p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="o">...</span>
<span class="n">Library</span> <span class="ow">not</span> <span class="n">loaded</span><span class="p">:</span> <span class="o">/</span><span class="n">usr</span><span class="o">/</span><span class="n">local</span><span class="o">/</span><span class="n">opt</span><span class="o">/</span><span class="n">opencv</span><span class="nd">@2</span><span class="o">/</span><span class="n">lib</span><span class="o">/</span><span class="n">libopencv_calib3d</span><span class="o">.</span><span class="mf">2.4</span><span class="o">.</span><span class="n">dylib</span>
<span class="o">...</span>
</pre></div>
</div>
<p>This can be resolved be installing OpenCV2.</p>
</div>
<div class="section" id="command-line-build-option">
<span id="command-line-build-option"></span><h3>Command Line Build Option<a class="headerlink" href="#command-line-build-option" title="Permalink to this headline"></a></h3>
<ul class="simple">
<li>You can also compile the project by using the following command at the command line. Change directories to this project’s folder then run the following:</li>
</ul>
<div class="highlight-bash"><div class="highlight"><pre><span></span>mvn clean package -e -P osx-x86_64-cpu
</pre></div>
</div>
<p>The <code class="docutils literal"><span class="pre">-P</span> <span class="pre"><platform></span></code> parameter tells the build which platform to target.
The <code class="docutils literal"><span class="pre">-e</span></code> will give you more details if the build fails. If it succeeds, you should see a lot of info and some warning messages, followed by:</p>
<div class="highlight-bash"><div class="highlight"><pre><span></span><span class="o">[</span>INFO<span class="o">]</span> ------------------------------------------------------------------------
<span class="o">[</span>INFO<span class="o">]</span> BUILD SUCCESS
<span class="o">[</span>INFO<span class="o">]</span> ------------------------------------------------------------------------
<span class="o">[</span>INFO<span class="o">]</span> Total time: <span class="m">1</span>.186 s
<span class="o">[</span>INFO<span class="o">]</span> Finished at: <span class="m">2018</span>-03-06T15:17:36-08:00
<span class="o">[</span>INFO<span class="o">]</span> Final Memory: 11M/155M
<span class="o">[</span>INFO<span class="o">]</span> ------------------------------------------------------------------------
</pre></div>
</div>
<p>The build generates a new jar file in the <code class="docutils literal"><span class="pre">target</span></code> folder called <code class="docutils literal"><span class="pre">scalaInference-1.0-SNAPSHOT.jar</span></code>.</p>
</div>
</div>
<div class="section" id="next-steps">
<span id="next-steps"></span><h2>Next Steps<a class="headerlink" href="#next-steps" title="Permalink to this headline"></a></h2>
<p>For more information about MXNet Scala resources, see the following:</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference external" href="/versions/1.3.1/api/scala/">Scala API</a></li>
<li class="toctree-l1"><a class="reference external" href="/api/scala/infer.html">Scala Inference API</a></li>
<li class="toctree-l1"><a class="reference external" href="https://github.com/apache/incubator-mxnet/tree/1.3.1/scala-package/examples/">Scala Examples</a></li>
<li class="toctree-l1"><a class="reference external" href="/versions/1.3.1/tutorials/index.html">MXNet Tutorials Index</a></li>
</ul>
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<h3><a href="../../index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">Run MXNet Scala Examples Using the IntelliJ IDE (macOS)</a><ul>
<li><a class="reference internal" href="#prerequisites">Prerequisites:</a><ul>
<li><a class="reference internal" href="#mac-prerequisites-setup">Mac Prerequisites Setup</a></li>
<li><a class="reference internal" href="#ubuntu-prerequisites-setup">Ubuntu Prerequisites Setup</a></li>
</ul>
</li>
<li><a class="reference internal" href="#access-the-maven-package-for-mxnet">Access the Maven Package for MXNet</a></li>
<li><a class="reference internal" href="#set-up-your-project">Set Up Your Project</a><ul>
<li><a class="reference internal" href="#troubleshooting">Troubleshooting</a></li>
<li><a class="reference internal" href="#troubleshooting">Troubleshooting</a></li>
<li><a class="reference internal" href="#command-line-build-option">Command Line Build Option</a></li>
</ul>
</li>
<li><a class="reference internal" href="#next-steps">Next Steps</a></li>
</ul>
</li>
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