Fechar um Frame (não JFrame)

/** 
     * Processes window events occurring on this component.
     * Hides the window or disposes of it, as specified by the setting
     * of the <code>defaultCloseOperation</code> property.
     *
     * @param  e  the window event
     * @see    #setDefaultCloseOperation
     * @see    java.awt.Window#processWindowEvent
     */
    protected void processWindowEvent(WindowEvent e) {
        super.processWindowEvent(e);

        if (e.getID() == WindowEvent.WINDOW_CLOSING) {
            switch(defaultCloseOperation) {
              case HIDE_ON_CLOSE:
                 setVisible(false);
                 break;
              case DISPOSE_ON_CLOSE:
                 dispose();
                 break;
              case DO_NOTHING_ON_CLOSE:
                 default: 
                 break;
	      case EXIT_ON_CLOSE:
                  // This needs to match the checkExit call in
                  // setDefaultCloseOperation
		System.exit(0);
		break;
            }
        }
    }