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<h1>IKVM.NET Virtual Machine (ikvm.exe)</h1>
</td>
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</table>
<p>The ikvm tool is a Java virtual machine implemented in .NET.</p>
<ul class="minitoc">
<li>
<a href="#Usage">Usage</a>
</li>
<li>
<a href="#Options">Options</a>
</li>
<li>
<a href="#Notes">Notes</a>
</li>
<li>
<a href="#Examples">Examples</a>
</li>
</ul>
<a name="N1000F"></a><a name="Usage"></a>
<h3>Usage</h3>
<div style="margin-left: 0 ; border: 2px">
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<td colspan="1" rowspan="1">
<div class="pre"> ikvm [ <em>options</em> ] <em>classname</em> [ <em>args ...</em> ]</div>
<div class="pre"> ikvm [ <em>options</em> ] -jar <em>jarfile</em> [ <em>args ...</em> ]</div>
</td>
</tr>
</table>
<dl>
<dt>options</dt>
<dd>Command-line options for the virtual machine.</dd>
<dt>classname</dt>
<dd>Fully-qualified name of a class containing the main method to execute. Do not include a
path or a .class extension. Do not use this with the -jar option.</dd>
<dt>jarfile</dt>
<dd>The name of an executable .jar file to execute. Used only with the -jar option.</dd>
<dt>args</dt>
<dd>Command-line arguments passed to the main class.</dd>
</dl>
</div>
<a name="N10054"></a><a name="Options"></a>
<h3>Options</h3>
<div style="margin-left: 0 ; border: 2px">
<table class="ForrestTable" cellspacing="1" cellpadding="4">
<tr>
<th colspan="1" rowspan="1">Option</th>
<th colspan="1" rowspan="1">Description</th>
</tr>
<tr>
<td colspan="1" rowspan="1">
-cp <em>classpath</em>
<br>
-classpath <em>classpath</em>
</td>
<td colspan="1" rowspan="1">
<p>Specifies the classpath for the JVM. <em>classpath</em> is a semicolon-delimited list of pathnames to directories and zip files / jar files.</p>
<p>Note: If you specify this option more than once, only the last is used.</p>
</td>
</tr>
<tr>
<td colspan="1" rowspan="1">
-D<em>property-name</em>=<em>value</em>
</td>
<td colspan="1" rowspan="1">
Set a system property named <em>property-name</em> to <em>value</em>. Note that there is no
space between the -D and <em>property-name</em>.
</td>
</tr>
<tr>
<td colspan="1" rowspan="1">
-Xsave
</td>
<td colspan="1" rowspan="1">
Saves the generated assembly (for debugging)
</td>
</tr>
<tr>
<td colspan="1" rowspan="1">
-Xtime
</td>
<td colspan="1" rowspan="1">
Times the execution
</td>
</tr>
<tr>
<td colspan="1" rowspan="1">
-Xbootclasspath:<em>classpath</em>
</td>
<td colspan="1" rowspan="1">
<p>Augments the boot classpath for the JVM. <em>classpath</em> is a semicolon-delimited list of pathnames to directories and jars.
These classes are made available through the boot class loader in addition to those in the GNU Classpath libraries.</p>
<p>Note: If you specify this option more than once, only the last is used.</p>
</td>
</tr>
<tr>
<td colspan="1" rowspan="1">
-Xtrace:<em>name</em>
</td>
<td colspan="1" rowspan="1">
Displays all tracepoints with the given name
</td>
</tr>
<tr>
<td colspan="1" rowspan="1">
-Xmethodtrace:<em>name</em>
</td>
<td colspan="1" rowspan="1">
Builds method trace into the specified output method
</td>
</tr>
<tr>
<td colspan="1" rowspan="1">
-Xwait
</td>
<td colspan="1" rowspan="1">
Keeps process hanging around after exit
</td>
</tr>
</table>
</div>
<a name="N10104"></a><a name="Notes"></a>
<h3>Notes</h3>
<div style="margin-left: 0 ; border: 2px">
<p>This command is intended to act as a "drop-in" replacement for the Sun / IBM JVM's. In many cases,
you can take a java command line and simply replace <em>java</em> with <em>ikvm</em>.</p>
<p>Please refer to the <a target="_top" href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/java.html">Sun documentation</a>
for usage details. Note that ikvm supports only the options listed here.</p>
<p>ikvm finds classes as follows:</p>
<ul>
<li>If no -cp/-classpath or -jar option specified, and no CLASSPATH environment variable is set,
looks in the current directory.</li>
<li>If no -cp/-classpath or -jar option specified, and CLASSPATH environment variable is set,
looks in directories specified in CLASSPATH (not in the current directory unless CLASSPATH contains .).</li>
<li>If -cp/-classpath option specified, ignores CLASSPATH environment variable, and looks only in
directories specified in -cp/-classpath option.</li>
<li>If -jar option specified, prepends jarfile to CLASSPATH (or -cp/-classpath specified classpath).
<p>
<strong>Note:</strong> This is different from the Sun JVM behavior.</p>
</li>
</ul>
<p>For information about creating executable jar files, see <a target="_top" href="http://www-106.ibm.com/developerworks/library/j-jar/">this IBM article</a>.</p>
</div>
<a name="N10139"></a><a name="Examples"></a>
<h3>Examples</h3>
<div style="margin-left: 0 ; border: 2px">
<div class="pre">
<span class="codefrag"> ikvm MyProg </span>
</div>
<p>Loads a class named MyProg.class from the current directory (unless the CLASSPATH environment variable
is set, in which case that is searched instead) and executes its main method.
</p>
<div class="pre">
<span class="codefrag"> ikvm -cp c:\java\lib;c:\mystuff\mylib.jar;c:\mystuff\otherlib.zip org.me.MyProg </span>
</div>
<p>Loads a class named org.me.MyProg from a file named MyProg.class and executes its main method. Searches for it in the following locations:</p>
<ul>
<li>c:\java\lib\org\me\MyProg.class</li>
<li>c:\mystuff\mylib.jar (looks inside for org/me/MyProg.class)</li>
<li>c:\mystuff\otherlib.zip (looks inside for org/me/MyProg.class)</li>
</ul>
<div class="pre">
<span class="codefrag"> ikvm -jar /usr/share/myprog.jar </span>
</div>
<p>Executes Java code in the executable jar file /usr/share/myprog.jar.</p>
</div>
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