Bug 123786 Following bug 109980, the compliance 6.0 should be added to the compiler's compliance list.
If the JRE/JDK used is a 1.6/6.0 VM, then the compliance 6.0 should be available. Compliance 1.6 implies source level 1.6 and target level 1.6.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/JavaProjectWizardFirstPage.java
public void update(Observable o, Object arg) {
			if (isInWorkspace()) {
				fLocation.setText(getDefaultPath(fNameGroup.getName()));
			}
			fireEvent();
		}
		public IPath getLocation() {
			if (isInWorkspace()) {
				return Platform.getLocation();
			}
			return Path.fromOSString(fLocation.getText().trim());
		}
		public boolean isInWorkspace() {
			return fWorkspaceRadio.isSelected();
		}
		/* (non-Javadoc)
		 * @see org.eclipse.jdt.internal.ui.wizards.dialogfields.IStringButtonAdapter#changeControlPressed(org.eclipse.jdt.internal.ui.wizards.dialogfields.DialogField)
		 */
		public void changeControlPressed(DialogField field) {
			final DirectoryDialog dialog= new DirectoryDialog(getShell());
			dialog.setMessage(NewWizardMessages.JavaProjectWizardFirstPage_directory_message); 
			String directoryName = fLocation.getText().trim();
			if (directoryName.length() == 0) {
				String prevLocation= JavaPlugin.getDefault().getDialogSettings().get(DIALOGSTORE_LAST_EXTERNAL_LOC);
				if (prevLocation != null) {
					directoryName= prevLocation;
				}
			}
		
			if (directoryName.length() > 0) {