This is an abstract adapter class used to receive
keyboard events. This is the class is used to receive the keyboard events. It
creates the keyListener objects using the addKeyListener() method. The
generated event is passed to every KeyListener objects that receives such
types of events using the addKeyListener() method of the object. The methods
in this class are empty.
The KeyPressed() method is used to receive the generated event when you press any key to the object. This method also sets the text of the source of the event to the label.
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