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JavaEnvUtils (Apache Ant API)
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<H2>

org.apache.tools.ant.util
 
Class JavaEnvUtils</H2>
<PRE>
java.lang.Object
 <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by ">org.apache.tools.ant.util.JavaEnvUtils
</PRE>
<HR>
<DL>
<DT><PRE>public final class JavaEnvUtils<DT>extends java.lang.Object</DL>
</PRE>

A set of helper methods related to locating executables or checking
 conditons of a given Java installation.

<DL>
<DT>Since:</DT>
 <DD>Ant 1.5</DD>
</DL>
<HR>

<A NAME="field_summary"></A>
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<TH ALIGN="left" COLSPAN="2">
Field Summary</TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_0">JAVA_1_0</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.0</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_1">JAVA_1_1</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.1</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_2">JAVA_1_2</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.2</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_3">JAVA_1_3</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.3</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_4">JAVA_1_4</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.4</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_5">JAVA_1_5</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.5</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_6">JAVA_1_6</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Version constant for Java 1.6</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#VERSION_1_0">VERSION_1_0</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number Version constant for Java 1.0</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#VERSION_1_1">VERSION_1_1</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number Version constant for Java 1.1</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#VERSION_1_2">VERSION_1_2</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number Version constant for Java 1.2</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#VERSION_1_3">VERSION_1_3</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number Version constant for Java 1.3</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#VERSION_1_4">VERSION_1_4</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number Version constant for Java 1.4</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#VERSION_1_5">VERSION_1_5</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number Version constant for Java 1.5</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#VERSION_1_6">VERSION_1_6</A></CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Number Version constant for Java 1.6</TD>
</TR>
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<A NAME="method_summary"></A>
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Method Summary</TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.io.File</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#createVmsJavaOptionFile(java.lang.String[])">createVmsJavaOptionFile</A>(java.lang.String[]&nbsp;cmd)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writes the command into a temporary DCL script and returns the
 corresponding File object.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJavaHome()">getJavaHome</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return the value of ${java.home}</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJavaVersion()">getJavaVersion</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the version of Java this class is running under.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;int</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJavaVersionNumber()">getJavaVersionNumber</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the version of Java this class is running under.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJdkExecutable(java.lang.String)">getJdkExecutable</A>(java.lang.String&nbsp;command)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Finds an executable that is part of a JDK installation based on
 the java.home system property.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.lang.String</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJreExecutable(java.lang.String)">getJreExecutable</A>(java.lang.String&nbsp;command)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Finds an executable that is part of a JRE installation based on
 the java.home system property.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.util.Vector</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJrePackages()">getJrePackages</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;get a vector of strings of packages built into
 that platforms runtime jar(s)</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;java.util.Vector</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#getJrePackageTestCases()">getJrePackageTestCases</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Testing helper method; kept here for unification of changes.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;boolean</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#isAtLeastJavaVersion(java.lang.String)">isAtLeastJavaVersion</A>(java.lang.String&nbsp;version)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Compares the current Java version to the passed in String -
 assumes the argument is one of the constants defined in this
 class.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static&nbsp;boolean</CODE></TD>
<TD><CODE><A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#isJavaVersion(java.lang.String)">isJavaVersion</A>(java.lang.String&nbsp;version)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Checks whether the current Java VM is Kaffe.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left">Methods inherited from class java.lang.Object</TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
&nbsp;

<A NAME="field_detail"></A>
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Field Detail</TH>
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</TABLE>

<A NAME="JAVA_1_0"></A><H3>
JAVA_1_0</H3>
<PRE>
public static final java.lang.String JAVA_1_0</PRE>
<DL>
<DD>Version constant for Java 1.0

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_0">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="VERSION_1_0"></A><H3>
VERSION_1_0</H3>
<PRE>
public static final int VERSION_1_0</PRE>
<DL>
<DD>Number Version constant for Java 1.0

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.VERSION_1_0">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="JAVA_1_1"></A><H3>
JAVA_1_1</H3>
<PRE>
public static final java.lang.String JAVA_1_1</PRE>
<DL>
<DD>Version constant for Java 1.1

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_1">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="VERSION_1_1"></A><H3>
VERSION_1_1</H3>
<PRE>
public static final int VERSION_1_1</PRE>
<DL>
<DD>Number Version constant for Java 1.1

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.VERSION_1_1">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="JAVA_1_2"></A><H3>
JAVA_1_2</H3>
<PRE>
public static final java.lang.String JAVA_1_2</PRE>
<DL>
<DD>Version constant for Java 1.2

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_2">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="VERSION_1_2"></A><H3>
VERSION_1_2</H3>
<PRE>
public static final int VERSION_1_2</PRE>
<DL>
<DD>Number Version constant for Java 1.2

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.VERSION_1_2">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="JAVA_1_3"></A><H3>
JAVA_1_3</H3>
<PRE>
public static final java.lang.String JAVA_1_3</PRE>
<DL>
<DD>Version constant for Java 1.3

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_3">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="VERSION_1_3"></A><H3>
VERSION_1_3</H3>
<PRE>
public static final int VERSION_1_3</PRE>
<DL>
<DD>Number Version constant for Java 1.3

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.VERSION_1_3">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="JAVA_1_4"></A><H3>
JAVA_1_4</H3>
<PRE>
public static final java.lang.String JAVA_1_4</PRE>
<DL>
<DD>Version constant for Java 1.4

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_4">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="VERSION_1_4"></A><H3>
VERSION_1_4</H3>
<PRE>
public static final int VERSION_1_4</PRE>
<DL>
<DD>Number Version constant for Java 1.4

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.VERSION_1_4">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="JAVA_1_5"></A><H3>
JAVA_1_5</H3>
<PRE>
public static final java.lang.String JAVA_1_5</PRE>
<DL>
<DD>Version constant for Java 1.5

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_5">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="VERSION_1_5"></A><H3>
VERSION_1_5</H3>
<PRE>
public static final int VERSION_1_5</PRE>
<DL>
<DD>Number Version constant for Java 1.5

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.VERSION_1_5">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="JAVA_1_6"></A><H3>
JAVA_1_6</H3>
<PRE>
public static final java.lang.String JAVA_1_6</PRE>
<DL>
<DD>Version constant for Java 1.6

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.JAVA_1_6">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="VERSION_1_6"></A><H3>
VERSION_1_6</H3>
<PRE>
public static final int VERSION_1_6</PRE>
<DL>
<DD>Number Version constant for Java 1.6

<DL>
<DT>See Also:<DD><A HREF="../../../../../constant-values.html#org.apache.tools.ant.util.JavaEnvUtils.VERSION_1_6">Constant Field Values</A></DL>
</DL>

<A NAME="method_detail"></A>
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Method Detail</TH>
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</TABLE>

<A NAME="getJavaVersion()"></A><H3>
getJavaVersion</H3>
<PRE>
public static java.lang.String getJavaVersion()</PRE>
<DL>
<DD>Returns the version of Java this class is running under.

<DD><DL>

<DT>Returns:<DD>the version of Java as a String, e.g. "1.6"</DL>
</DD>
</DL>
<HR>

<A NAME="getJavaVersionNumber()"></A><H3>
getJavaVersionNumber</H3>
<PRE>
public static int getJavaVersionNumber()</PRE>
<DL>
<DD>Returns the version of Java this class is running under.
 This number can be used for comparisions; it will always be

<DD><DL>

<DT>Returns:<DD>the version of Java as a number 10x the major/minor,
 e.g Java1.5 has a value of 15</DL>
</DD>
</DL>
<HR>

<A NAME="isJavaVersion(java.lang.String)"></A><H3>
isJavaVersion</H3>
<PRE>
public static boolean isJavaVersion(java.lang.String&nbsp;version)</PRE>
<DL>
<DD>Compares the current Java version to the passed in String -
 assumes the argument is one of the constants defined in this
 class.
 Note that Ant now requires JDK 1.4+ so <A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_0"><CODE>JAVA_1_0</CODE></A> through
 <A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_3"><CODE>JAVA_1_3</CODE></A> need no longer be tested for.

<DD><DL>
<DT>Parameters:<DD><CODE>version</CODE> - the version to check against the current version.
<DT>Returns:<DD>true if the version of Java is the same as the given version.<DT>Since:</DT>
 <DD>Ant 1.5</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="isAtLeastJavaVersion(java.lang.String)"></A><H3>
isAtLeastJavaVersion</H3>
<PRE>
public static boolean isAtLeastJavaVersion(java.lang.String&nbsp;version)</PRE>
<DL>
<DD>Compares the current Java version to the passed in String -
 assumes the argument is one of the constants defined in this
 class.
 Note that Ant now requires JDK 1.4+ so <A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_0"><CODE>JAVA_1_0</CODE></A> through
 <A HREF="../../../../../org/apache/tools/ant/util/JavaEnvUtils.html#JAVA_1_3"><CODE>JAVA_1_3</CODE></A> need no longer be tested for.

<DD><DL>
<DT>Parameters:<DD><CODE>version</CODE> - the version to check against the current version.
<DT>Returns:<DD>true if the version of Java is the same or higher than the
 given version.<DT>Since:</DT>
 <DD>Ant 1.7</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="isKaffe()"></A><H3>
isKaffe</H3>
<PRE>
public static boolean isKaffe()</PRE>
<DL>
<DD>Checks whether the current Java VM is Kaffe.

<DD><DL>

<DT>Returns:<DD>true if the current Java VM is Kaffe.<DT>Since:</DT>
 <DD>Ant 1.6.3</DD>
<DT>See Also:<DD><a href="http://www.kaffe.org/">http://www.kaffe.org/</a></DL>
</DD>
</DL>
<HR>

<A NAME="getJreExecutable(java.lang.String)"></A><H3>
getJreExecutable</H3>
<PRE>
public static java.lang.String getJreExecutable(java.lang.String&nbsp;command)</PRE>
<DL>
<DD>Finds an executable that is part of a JRE installation based on
 the java.home system property.

<code>java</code>, <code>keytool</code>,
 <code>policytool</code>, <code>orbd</code>, <code>rmid</code>,
 <code>rmiregistry</code>, <code>servertool</code> and
 <code>tnameserv</code> are JRE executables on Sun based
 JRE's.

You typically find them in <code>JAVA_HOME/jre/bin</code> if
 <code>JAVA_HOME</code> points to your JDK installation. JDK
 &lt; 1.2 has them in the same directory as the JDK
 executables.

<DD><DL>
<DT>Parameters:<DD><CODE>command</CODE> - the java executable to find.
<DT>Returns:<DD>the path to the command.<DT>Since:</DT>
 <DD>Ant 1.5</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="getJdkExecutable(java.lang.String)"></A><H3>
getJdkExecutable</H3>
<PRE>
public static java.lang.String getJdkExecutable(java.lang.String&nbsp;command)</PRE>
<DL>
<DD>Finds an executable that is part of a JDK installation based on
 the java.home system property.

You typically find them in <code>JAVA_HOME/bin</code> if
 <code>JAVA_HOME</code> points to your JDK installation.

<DD><DL>
<DT>Parameters:<DD><CODE>command</CODE> - the java executable to find.
<DT>Returns:<DD>the path to the command.<DT>Since:</DT>
 <DD>Ant 1.5</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="getJrePackageTestCases()"></A><H3>
getJrePackageTestCases</H3>
<PRE>
public static java.util.Vector getJrePackageTestCases()</PRE>
<DL>
<DD>Testing helper method; kept here for unification of changes.

<DD><DL>

<DT>Returns:<DD>a list of test classes depending on the java version.</DL>
</DD>
</DL>
<HR>

<A NAME="getJrePackages()"></A><H3>
getJrePackages</H3>
<PRE>
public static java.util.Vector getJrePackages()</PRE>
<DL>
<DD>get a vector of strings of packages built into
 that platforms runtime jar(s)

<DD><DL>

<DT>Returns:<DD>list of packages.</DL>
</DD>
</DL>
<HR>

<A NAME="createVmsJavaOptionFile(java.lang.String[])"></A><H3>
createVmsJavaOptionFile</H3>
<PRE>
public static java.io.File createVmsJavaOptionFile(java.lang.String[]&nbsp;cmd)
 throws java.io.IOException</PRE>
<DL>
<DD>Writes the command into a temporary DCL script and returns the
 corresponding File object.
 It is the job of the caller to delete the file on exit.

<DD><DL>
<DT>Parameters:<DD><CODE>cmd</CODE> - the command.
<DT>Returns:<DD>the file containing the command.
<DT>Throws:
<DD><CODE>java.io.IOException</CODE> - if there is an error writing to the file.</DL>
</DD>
</DL>
<HR>

<A NAME="getJavaHome()"></A><H3>
getJavaHome</H3>
<PRE>
public static java.lang.String getJavaHome()</PRE>
<DL>
<DD>Return the value of ${java.home}

<DD><DL>

<DT>Returns:<DD>the java home value.</DL>
</DD>
</DL>

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