JFrame listen to a resize event?

Hello,

 Every time I drag and expand my JFrame it does not seem to respond to the events I used. Is there a way I can listen for the resize event of a JFrame and check to see if both the height and width are the same. If they are not force a automatic adjustment to make the JFrame have both the same height and width using the smaller of the two to set the other? A simple example would be great. Thank you.
enterciteAsked:
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nex1999Commented:
try adding a Component Listener:

        this.addComponentListener(new ComponentAdapter()
        {
              public void componentResized(ComponentEvent event)
              {
                   if(getWidth() < getHeight() )
            setSize(getWidth(), getWidth() );
          else
                      setSize(getHeight(), getHeight() );
                   repaint();
              }
          });
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TolsCommented:
If You want to see components resizing during Frame resize:

this.getToolkit().setDynamicLayout(true);

Just a tip. :-)
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