Bug 23320 Incomplete classpath and circular classpath options should be surfaced
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CompilerPreferencePage.java
private Hashtable fWorkingValues;
	private ArrayList fCheckBoxes;
	private ArrayList fComboBoxes;
	private ArrayList fTextBoxes;
	
	private SelectionListener fSelectionListener;
	private ModifyListener fTextModifyListener;
	
	private ArrayList fComplianceControls;
	public CompilerPreferencePage() {
		setPreferenceStore(JavaPlugin.getDefault().getPreferenceStore());
		setDescription(JavaUIMessages.getString("CompilerPreferencePage.description")); 
	
		fWorkingValues= JavaCore.getOptions();
		fWorkingValues.put(INTR_DEFAULT_COMPLIANCE, getCurrentCompliance());
		
		fCheckBoxes= new ArrayList();
		fComboBoxes= new ArrayList();
		fTextBoxes= new ArrayList(2); 
		
		fComplianceControls= new ArrayList();
		
		fSelectionListener= new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) {}
			public void widgetSelected(SelectionEvent e) {
				controlChanged(e.widget);
			}
		};