Bug 30941 Preferences default initialization. Can not do a syncExec
20030204 The initialization of the preference default currently contains a final Display display= Display.getDefault(); display.syncExec(new Runnable() { public void run() { Color c= display.getSystemColor(SWT.COLOR_GRAY); rgbs[0]= c.getRGB(); c= display.getSystemColor(SWT.COLOR_LIST_FOREGROUND); rgbs[1]= c.getRGB(); c= display.getSystemColor(SWT.COLOR_LIST_BACKGROUND); rgbs[2]= c.getRGB(); } }); We should avoid and remove this as this is a candidate for a deadlock.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
boolean autoactivation= fOverlayStore.getBoolean(PreferenceConstants.CODEASSIST_AUTOACTIVATION);
        fAutoInsertDelayText.setEnabled(autoactivation);
        fAutoInsertJavaTriggerText.setEnabled(autoactivation);
        fAutoInsertJavaDocTriggerText.setEnabled(autoactivation);
    }
	
	/*
	 * @see PreferencePage#performOk()
	 */
	public boolean performOk() {
		fJavaEditorHoverConfigurationBlock.performOk();
		fOverlayStore.propagate();
		JavaPlugin.getDefault().savePluginPreferences();
		return true;
	}
	
	/*
	 * @see PreferencePage#performDefaults()
	 */
	protected void performDefaults() {
		
		fOverlayStore.loadDefaults();
		initializeFields();
		handleSyntaxColorListSelection();
		handleAppearanceColorListSelection();
		handleAnnotationListSelection();
		handleContentAssistColorListSelection();
		fJavaEditorHoverConfigurationBlock.performDefaults();		
		super.performDefaults();
		fPreviewViewer.invalidateTextPresentation();