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Working with JREs
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<h1>
Working with JREs
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<p>
You can install as many different Java Runtime Environments (JREs) as you like. A JRE definition consists of:
</p>
<ul>
<li>
The type of the JRE (e.g. Standard VM or Standard 1.x.x VM)
</li>
<li>
A name
</li>
<li>
The location where the JRE is installed
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<li>
The location (URL) of the Javadoc
</li>
<li>
The system libraries containing the Java system classes (like java.lang.Object). Optionally, the system libraries can be associated with the source file containing the
source for the classes in the JRE's CLASS files
</li>
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<p>
You can switch the default JRE for the workbench. The default JRE is the JRE to which the pre-defined classpath variables JRE_LIB, JRE_SRC and JRE_SRCROOT are bound.
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<p>
<img src="../images/ngrelc.png" alt="Related concepts" border="0" >
</p>
<p>
<a href="../concepts/concepts-1.htm">Java development tools (JDT)</a><br>
<a href="../concepts/cclsspthv.htm">Classpath variable</a>
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<p>
<img src="../images/ngrelt.png" alt="Related tasks" border="0" >
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<p>
<a href="tasks-121.htm">Adding a new JRE definition</a><br>
<a href="tasks-120.htm">Assigning the default JRE for the workbench</a><br>
<a href="tasks-124.htm">Choosing a JRE for launching a project</a><br>
<a href="tasks-deleteJRE.htm">Deleting a JRE definition</a><br>
<a href="tasks-123.htm">Editing a JRE definition</a><br>
<a href="tasks-122.htm">Overriding the default system libraries for a JRE definition</a><br>
<a href="tasks-111.htm">Viewing and editing a project's build path</a>
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<img src="../images/ngrelr.png" alt="Related reference" border="0" ><br>
<a href="../reference/ref-19.htm">Installed JREs preference page</a>
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