Eine gute Antwort könnte sein:

Not really.

Picture of the Relations

Perhaps a picture is needed. Clouds represent class definitions, solid rectangles represent objects, and dotted rectangles represent the static part of a class.

Look back at the example program as you study the diagram.

Don't be discouraged if this is less than perfectly clear! It usually takes some time to get all of these relationships straight. A bit more practice would not hurt, either.


(Thought question: ) Must you use the "close button" of a frame to quit the program? Could a JButton be used?