Answer:

Visually nothing happens. The actionPerformed() method is called with a new Event object, but it changes nothing. If you feel like some fun, modify the code so that each click changes the background to a different color.

Program's Output

The pictures show the output of the program. The original frame is on the left. On the right is the frame after a button click.

The Java system automatically paints the frame when any of several things has happened:

The frame has just been created
The frame has been maximized
The frame was previously hidden behind another frame and has just been exposed

However, a mere button click does not necessarily mean that a frame should be repainted. If it does, as it does in this program, call repaint() in the actionPerformed() method.

QUESTION 16:

(Memory Test: ) What is the name of the method that receives ActionEvents when a button is clicked?