Chapter 14, Problem 8SA

Explanation of Solution

Adapter class:

• An adapter class is a class, which offers unfilled executions of each methods in a definite listener interface.
• It extend a class from one of the adapter class and it inherits the empty methods.
• It is valuable when some of the procedures wanted to be supersede, that are distinct by that interface.

Adapter class makes programming tasks more convenient:

Consider the below example,

• The “MouseListener” interface includes five methods, that are called when the mouse is clicked, pressed, or released.
  • In this case, the “MouseEvent” is also happened when the mouse enters and exits a component.
• Here, the “MouseListener” interface is executed by an applet and record itself to obtain mouse events...