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<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><title>JDK Environment</title><link rel="stylesheet" href="core.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.74.0"/></head><body><div class="sect1" title="JDK Environment"><div class="titlepage"><div><div><h1 class="title"><a id="I_sect13_id644207"/>JDK Environment</h1></div></div></div><p><a id="idx10122" class="indexterm"/> <a id="idx10129" class="indexterm"/>After you install Java 7, the core <a id="I_indexterm3_id644237" class="indexterm"/><span class="emphasis"><em>java</em></span> runtime command may appear in your path (available to run) automatically. However, many of the other commands provided with the JDK may not be available unless you add the Java <a id="I_indexterm3_id644247" class="indexterm"/><a id="I_indexterm3_id644252" class="indexterm"/><a id="I_indexterm3_id644257" class="indexterm"/><a id="I_indexterm3_id644263" class="indexterm"/><span class="emphasis"><em>bin</em></span> directory to your execution path. The following commands show how to do this on Mac OS X and Windows. You will, of course, have to change the path to match the version of Java you have installed.</p><a id="I_programlisting3_id644275"/><pre class="programlisting"><code class="err">#</code> <code class="n">Mac</code> <code class="n">OS</code> <code class="n">X</code> <code class="n">export</code> <code class="n">JAVA_HOME</code><code class="o">=/</code><code class="n">Library</code><code class="o">/</code><code class="n">Java</code><code class="o">/</code><code class="n">JavaVirtualMachines</code><code class="o">/</code><code class="n">jdk1</code><code class="o">.</code><code class="mf">7.0</code><code class="n">_09</code><code class="o">.</code><code class="na">jdk</code><code class="o">/</code><code class="n">Contents</code><code class="o">/</code><code class="n">Home</code> <code class="n">export</code> <code class="n">PATH</code><code class="o">=</code><code class="n">$PATH</code><code class="o">:</code><code class="n">$JAVA_HOME</code><code class="o">/</code><code class="n">bin</code> <code class="err">#</code> <code class="n">Windows</code> <code class="n">set</code> <code class="n">JAVA_HOME</code><code class="o">=</code><code class="nl">c:</code><code class="err">\</code><code class="n">Program</code> <code class="n">Files</code><code class="err">\</code><code class="n">Java</code><code class="err">\</code><code class="n">jdk1</code><code class="o">.</code><code class="mf">7.0</code><code class="n">_09</code> <code class="n">set</code> <code class="n">PATH</code><code class="o">=%</code><code class="n">PATH</code><code class="o">%;%</code><code class="n">JAVA_HOME</code><code class="o">%</code><code class="err">\</code><code class="n">bin</code></pre><p>On Mac OS X, the situation may be more confusing because recent versions ship with “stubs” for the Java commands installed. If you attempt to run one of these commands, the OS will prompt you to download Java at that time. As of the time of this writing, Mac OS X still ships with Java version 6, so you will need to download version 7 and set up your environment as just shown.</p><p>When in doubt, your go-to test for determining which version of the tools you are using is to use the <a id="I_indexterm3_id644295" class="indexterm"/><code class="literal">-version</code> flag on the <span class="emphasis"><em>java</em></span> and <span class="emphasis"><em>javac</em></span> commands:<a id="I_indexterm3_id644314" class="indexterm"/><a id="I_indexterm3_id644321" class="indexterm"/></p><a id="I_programlisting3_id644328"/><pre class="programlisting"><code class="n">java</code> <code class="o">-</code><code class="n">version</code> <code class="err">#</code> <code class="n">java</code> <code class="n">version</code> <code class="s">"1.7.0_07"</code> <code class="err">#</code> <code class="n">Java</code><code class="o">(</code><code class="n">TM</code><code class="o">)</code> <code class="n">SE</code> <code class="n">Runtime</code> <code class="n">Environment</code> <code class="o">(</code><code class="n">build</code> <code class="mf">1.7</code><code class="o">.</code><code class="mi">0</code><code class="n">_07</code><code class="o">-</code><code class="n">b10</code><code class="o">)</code> <code class="err">#</code> <code class="n">Java</code> <code class="n">HotSpot</code><code class="o">(</code><code class="n">TM</code><code class="o">)</code> <code class="mi">64</code><code class="o">-</code><code class="n">Bit</code> <code class="n">Server</code> <code class="n">VM</code> <code class="o">(</code><code class="n">build</code> <code class="mf">23.3</code><code class="o">-</code><code class="n">b01</code><code class="o">,</code> <code class="n">mixed</code> <code class="n">mode</code><code class="o">)</code> <code class="n">javac</code> <code class="o">-</code><code class="n">version</code> <code class="err">#</code> <code class="n">javac</code> <code class="mf">1.7</code><code class="o">.</code><code class="mi">0</code><code class="n">_07</code></pre></div></body></html>