Basic HTML version of Foils prepared 18 May 97

Foil 60 More child classes

From Java Tutorial - Spring 1997 Part II: Java Language and Object-Oriented Concepts Peking Tutorial, Web Certificate -- Spring-Summer 1997. by Nancy J. McCracken,Geoffrey C. Fox
Once we have structured the concepts of our data into classes, it is easy to add new shapes of movable objects as child classes of mRectangle. These classes only have to redefine paint to draw a differently shaped object.

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