Bug 125144 Clicking Show Project in Package Explorer results in exception
Clicking Show Project in Code model results in exception in DOS box === Steps to Reproduce: Create a Java project Open the Package Explorer Click the View menu Show - Projects. (This actually is a radio group menu item. It is by default selected, so clicking it again should have no effect) === Observed behaviour: Dos box: Unhandled event loop exception Reason: java.lang.NullPointerException See .log file (will be attached) === Expected behaviour: No exception === Reproducibility: yes
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
refreshViewer= true;
		}
		if (refreshViewer)
			fViewer.refresh();
	}
	
	/* (non-Javadoc)
	 * @see IViewPartInputProvider#getViewPartInput()
	 */
	public Object getViewPartInput() {
		if (fViewer != null) {
			return fViewer.getInput();
		}
		return null;
	}
	public void collapseAll() {
		try {
			fViewer.getControl().setRedraw(false);		
			fViewer.collapseToLevel(getViewPartInput(), AbstractTreeViewer.ALL_LEVELS);
		} finally {
			fViewer.getControl().setRedraw(true);
		}
	}
	
	public PackageExplorerPart() { 
		initLinkingEnabled();
		fPostSelectionListener= new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				handlePostSelectionChanged(event);
			}