init("", null);
actionListener = createActionListener(); changeListener = createChangeListener(); itemListener = createItemListener();  horizontalAlignment = CENTER; horizontalTextPosition = TRAILING; verticalAlignment = CENTER; verticalTextPosition = CENTER; borderPainted = true; contentAreaFilled = true; focusPainted = true; setFocusable(true); setAlignmentX(CENTER_ALIGNMENT); setAlignmentY(CENTER_ALIGNMENT); setDisplayedMnemonicIndex(-1);
  public AbstractButton()  {    init("", null);    updateUI();  }