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| Assigning the default JRE for the workbench |
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| <h1> |
| Assigning the default JRE for the workbench |
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| <p> |
| The default JRE is used for compiling and launching Java programs in all projects unless you specifically override the default JRE. |
| The default JRE is the installed JRE to which JRE_LIB, JRE_SRC and JRE_SRCROOT are bound. |
| A project is not compiled against the default JRE if the JRE_LIB variable has been removed from its build path. |
| A program is not launched with the default JRE if a custom runtime JRE has been set for its project. |
| </p> |
| <p> |
| Here is how you can change the default JRE: |
| </p> |
| <ol> |
| <li> |
| Open the |
| <a class="command-link" href='javascript:executeCommand("org.eclipse.ui.window.preferences(preferencePageId=org.eclipse.jdt.debug.ui.preferences.VMPreferencePage)")'> |
| <img src="PLUGINS_ROOT/org.eclipse.help/command_link.png"> |
| <strong>Java > Installed JREs</strong></a> preference page. |
| </li> |
| <li> |
| Check the box on the line for the JRE that you want to assign as the default JRE in your workbench. |
| If the JRE you want to assign as the default does not appear in the list, you must <a href="tasks-121.htm">add it</a>. |
| </li> |
| <li> |
| Click <strong>OK</strong>. |
| </li> |
| </ol> |
| <strong>Note</strong>: The JRE_LIB, JRE_SRC and JRE_SRCROOT system variables are automatically updated when you change the default JRE. This may cause a build to occur if you |
| have auto build enabled |
| (<strong>Project > Build Automatically</strong> or in the |
| <a class="command-link" href='javascript:executeCommand("org.eclipse.ui.window.preferences(preferencePageId=org.eclipse.ui.preferencePages.Workspace)")'> |
| <img src="PLUGINS_ROOT/org.eclipse.help/command_link.png"> |
| <strong>General > Workspace</strong></a> preference page). |
| <p> |
| <img src="../images/ngrelc.png" alt="Related concepts" border="0" > |
| </p> |
| <p> |
| <a href="../concepts/concepts-1.htm">Java development tools (JDT)</a> |
| </p> |
| <p> |
| <img src="../images/ngrelt.png" alt="Related tasks" border="0" > |
| </p> |
| <p> |
| <a href="tasks-121.htm">Adding a new JRE definition</a><br> |
| <a href="tasks-124.htm">Choosing a JRE for launching a project</a><br> |
| <a href="tasks-110.htm">Working with build paths</a><br> |
| <a href="tasks-JREs.htm">Working with JREs</a> |
| </p> |
| <p> |
| <img src="../images/ngrelr.png" alt="Related reference" border="0" ><br> |
| <a href="../reference/ref-19.htm">Installed JREs preference page</a> |
| </p> |
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