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136 lines
4.6 KiB
HTML
136 lines
4.6 KiB
HTML
<html>
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<head>
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<meta http-equiv="Content-Language" content="en-us">
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<title>Ant User Manual</title>
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</head>
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<body>
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<h2><a name="java">Java</a></h2>
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<h3>Description</h3>
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<p>Executes a Java class within the running (Ant) VM or forks another VM if
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specified.</p>
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<p>Be careful that the executed class doesn't call System.exit(), because it
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will terminate the VM and thus Ant. In case this happens, it's highly suggested
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that you set the fork attribute so that System.exit() stops the other VM and not
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the one that is currently running Ant.</p>
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<h3>Parameters</h3>
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<table border="1" cellpadding="2" cellspacing="0">
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<tr>
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<td valign="top"><b>Attribute</b></td>
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<td valign="top"><b>Description</b></td>
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<td align="center" valign="top"><b>Required</b></td>
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</tr>
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<tr>
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<td valign="top">classname</td>
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<td valign="top">the Java class to execute.</td>
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<td align="center" valign="top">Yes</td>
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</tr>
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<tr>
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<td valign="top">args</td>
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<td valign="top">the arguments for the class that is
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executed. <b>deprecated, use nested <code><arg></code>
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elements instead.</b></td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">classpath</td>
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<td valign="top">the classpath to use.</td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">classpathref</td>
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<td valign="top">the classpath to use, given as <a
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href="../using.html#references">reference</a> to a PATH defined elsewhere.</td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">fork</td>
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<td valign="top">if enabled triggers the class execution in another VM
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(disabled by default)</td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">jvm</td>
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<td valign="top">the command used to invoke the Java Virtual Machine,
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default is 'java'. The command is resolved by java.lang.Runtime.exec().
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Ignored if fork is disabled.
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</td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">jvmargs</td>
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<td valign="top">the arguments to pass to the forked VM (ignored
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if fork is disabled). <b>deprecated, use nested
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<code><jvmarg></code> elements instead.</b></td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">maxmemory</td>
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<td valign="top">Max amount of memory to allocate to the forked VM
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(ignored if fork is disabled)</td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">failonerror</td>
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<td valign="top">Stop the buildprocess if the command exits with a
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returncode other than 0. Only available if fork is true.</td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">dir</td>
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<td valign="top">The directory to invoke the VM in. (ignored if
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fork is disabled)</td>
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<td align="center" valign="top">No</td>
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</tr>
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<tr>
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<td valign="top">output</td>
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<td valign="top">Name of a file to write the output to.</td>
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<td align="center" valign="top">No</td>
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</tr>
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</table>
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<h3>Parameters specified as nested elements</h3>
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<h4>arg and jvmarg</h4>
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<p>Use nested <code><arg></code> and <code><jvmarg></code>
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elements to specify arguments for the or the forked VM. See <a
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href="../using.html#arg">Command line arguments</a>.</p>
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<h4>sysproperty</h4>
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<p>Use nested <code><sysproperty></code>
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elements to specify system properties required by the class.
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These properties will be made available to the VM during the execution
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of the class (either ANT's VM or the forked VM). The attributes
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for this element are the same as for <a href="exec.html#env">environment
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variables</a>.</p>
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<h4>classpath</h4>
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<p><code>Java</code>'s <i>classpath</i> attribute is a <a
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href="../using.html#path">PATH like structure</a> and can also be set via a nested
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<i>classpath</i> element.</p>
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<h5>Example</h5>
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<pre>
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<java classname="test.Main" >
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<arg value="-h"/>
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<classpath>
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<pathelement location="\test.jar"/>
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<pathelement path="${java.class.path}"/>
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</classpath>
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</java>
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</pre>
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<h3>Examples</h3>
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<pre> <java classname="test.Main"/></pre>
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<pre> <java classname="test.Main"
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fork="yes" >
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<sysproperty key="DEBUG" value="true"/>
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<arg value="-h"/>
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<jvmarg value="-Xrunhprof:cpu=samples,file=log.txt,depth=3"/>
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</java>
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</pre>
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<hr>
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<p align="center">Copyright © 2000,2001 Apache Software Foundation. All rights
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Reserved.</p>
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</body>
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</html>
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