e562. removing the title bar of a frame.txt

这里面包含了一百多个JAVA源文件

The title bar and other decorations can be removed from a frame. A frame without decorations looks and behaves like a Window container. However, if the frame never needs the decorations, it is better to use a Window container. 
Note: The decorations can only be removed while the frame is not visible. 

    Frame frame = new Frame();
    frame.setUndecorated(true);
    
    // Get the current decorated state
    boolean undecorated = frame.isUndecorated();