Window.java 文件源码

/**
 * Returns an array of all the window focus listeners registered on this
 * window.
 *
 * @since 1.4
 */
public synchronized WindowFocusListener[] getWindowFocusListeners()
{
  return (WindowFocusListener[])
    AWTEventMulticaster.getListeners(windowFocusListener,
                                     WindowFocusListener.class);
}