e569. determining when a frame or window is iconized or maximized.txt

这里面包含了一百多个JAVA源文件

// Create the frame
    Frame frame = new Frame();
    
    // Create a listener
    WindowStateListener listener = new WindowAdapter() {
        public void windowStateChanged(WindowEvent evt) {
            int oldState = evt.getOldState();
            int newState = evt.getNewState();
    
            if ((oldState & Frame.ICONIFIED) == 0
                && (newState & Frame.ICONIFIED) != 0) {
                // Frame was iconized
            } else if ((oldState & Frame.ICONIFIED) != 0
                && (newState & Frame.ICONIFIED) == 0) {
                // Frame was deiconized
            }
    
            if ((oldState & Frame.MAXIMIZED_BOTH) == 0
                && (newState & Frame.MAXIMIZED_BOTH) != 0) {
                // Frame was maximized
            } else if ((oldState & Frame.MAXIMIZED_BOTH) != 0
                && (newState & Frame.MAXIMIZED_BOTH) == 0) {
                // Frame was minimized
            }
        }
    };
    
    // Register the listener with the frame
    frame.addWindowStateListener(listener);

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