public boolean areFocusTraversalKeysSet(int id) { if (id < KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS || id > KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS) throw new IllegalArgumentException();
public boolean areFocusTraversalKeysSet (int id) { if (id != KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS && id != KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS && id != KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS) throw new IllegalArgumentException ();
	public boolean areFocusTraversalKeysSet(int id) {		if (id < KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS || id > KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS)			throw new IllegalArgumentException();		return focusTraversalKeys != null && focusTraversalKeys[id] != null;	}