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eclipse / platform / eclipse.platform.common / 04bca5aa5d624a21d704b33e3e6ce369e54e345e / . / bundles / org.eclipse.jdt.doc.user / reference / preferences / ref-preferences-java.htm
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Java Preferences
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<h1>
Java Preferences
</h1>
<p>
The following Java preferences can be set on the
<a class="command-link" href='javascript:executeCommand("org.eclipse.ui.window.preferences(preferencePageId=org.eclipse.jdt.ui.preferences.JavaBasePreferencePage)")'>
<img src="PLUGINS_ROOT/org.eclipse.help/command_link.svg" alt="Opens the Java preference page">
<b>Java</b></a> preference page
and its sub-pages.
</p>
<ul>
<li><a href="java/ref-preferences-appearance.htm">Appearance</a></li>
<li><a href="java/ref-preferences-build-path.htm">Build Path</a></li>
<li><a href="java/ref-preferences-code-style.htm">Code Style</a></li>
<li><a href="java/ref-preferences-compiler.htm">Compiler</a></li>
<li><a href="java/debug/ref-debug.htm">Debug</a></li>
<li><a href="java/ref-preferences-editor.htm">Editor</a></li>
<li><a href="java/ref-preferences-installed-jres.htm">Installed JREs</a></li>
<li><a href="java/ref-preferences-junit.htm">JUnit</a></li>
<li><a href="java/ref-preferences-properties-files-editor.htm">Properties File Editor</a></li>
</ul>
<table border="1" cellspacing="0" cellpadding="5" summary="General Java settings">
<thead>
<tr>
<th>
<p>
Option
</p>
</th>
<th>
<p>
Description
</p>
</th>
<th>
<p>
Default
</p>
</th>
</tr>
</thead>
<tbody>
<tr>
<td valign="top">
Action on double click in the Package Explorer
</td>
<td valign="top">
<dl>
<dt>
<strong>Go into the selected element</strong>
</dt>
<dd>
When you double click a container, a <strong>Go Into</strong> command is executed.
<br>
See <strong>Go Into</strong> from the <a href="../ref-menu-navigate.htm">Navigate</a> menu.
</dd>
<dt>
<strong>Expand the selected element</strong>
</dt>
<dd>
When you double click a container, it is expanded and its children are revealed.
</dd>
</dl>
</td>
<td valign="top">
Expand the selected element
</td>
</tr>
<tr>
<td valign="top">
When opening a Type Hierarchy
</td>
<td valign="top">
<dl>
<dt>
<strong>Open a new Type Hierarchy Perspective</strong>
</dt>
<dd>
Opens a new Type Hierarchy perspective whenever a Type Hierarchy view is opened.
</dd>
<dt>
<strong>Show the Type Hierarchy View in the current perspective</strong>
</dt>
<dd>
The Type Hierarchy view is displayed in the current perspective.
</dd>
</dl>
<em>Note: On the Workbench preferences page, you can choose whether new perspectives open in a new window, in the current window, or as a replacement for the current
perspective.</em>
</td>
<td valign="top">
Show the Type Hierarchy View in the current perspective
</td>
</tr>
<tr>
<td valign="top">
Refactoring Java code
</td>
<td valign="top">
<dl>
<dt>
<strong>Save all modified resources automatically prior to refactoring</strong>
</dt>
<dd>
If this option is turned off, refactorings may prompt to save modified files if required.
If it is turned on, all modified files are saved without prompting prior to opening a refactoring wizard.
</dd>
</dl>
</td>
<td valign="top">
Off
</td>
</tr>
<tr>
<td valign="top">&nbsp;
</td>
<td valign="top">
<dl>
<dt>
<strong>Rename in editor without dialog</strong>
</dt>
<dd>
If this option is turned on, then the rename refactoring will not show a dialog if invoked inside a Java editor.
Instead the new name for the element to rename can be typed into the editor right away.
</dd>
</dl>
</td>
<td valign="top">
On
</td>
</tr>
<tr>
<td valign="top">
Search
</td>
<td valign="top">
<dl>
<dt>
<strong>Use reduced search menu</strong>
</dt>
<dd>
If this option is turned on, the search context menus show only the most frequently used search actions.
</dd>
</dl>
</td>
<td valign="top">
On
</td>
</tr>
<tr>
<td valign="top">
Search
</td>
<td valign="top">
<dl>
<dt>
<strong>Enable new Java index</strong>
</dt>
<dd>
If this option is turned on, Eclipse will build and use a new index for
accelerating many Java operations. This will reduce the number of UI freezes but
will consume additional memory and disk space.
</dd>
</dl>
</td>
<td valign="top">
Off
</td>
</tr>
<tr>
<td valign="top">
Search
</td>
<td valign="top">
<dl>
<dt>
<strong>Rebuild Index</strong>
</dt>
<dd>
Pressing this button will delete all information cached in the Java index.
This can be used to save disk space since the rebuilt index is often smaller
than the original. It can also be used to fix index corruption in cases where
types appear to be missing from the UI.
</dd>
</dl>
</td>
<td valign="top">
</td>
</tr>
<tr>
<td valign="top">
Java dialogs
</td>
<td valign="top">
<dl>
<dt>
<strong>Clear all 'do not show again' settings and show all hidden dialogs again</strong>
</dt>
<dd>
If pressed, all 'do not show' settings are cleared.
</dd>
</dl>
</td>
<td valign="top">
Button
</td>
</tr>
</tbody>
</table>
<h3 class="related">Related concepts</h3>
<a href="../../concepts/concept-java-views.htm">Java views</a>
<h3 class="related">Related references</h3>
<a href="../../reference/views/ref-view-package-explorer.htm">Package Explorer view</a><br>
<a href="../../reference/views/ref-type-hierarchy.htm">Type Hierarchy view</a>
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