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Foil 55 Object-Oriented Programming in JAVA - defining a class

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
1 We define a parent class for movable point objects. Each instance of this class is represented by an x,y location, by a dx,dy offset for the object to move, and a color for the object. This example also illustrates data encapsulation, where users of the class must use methods to get data of the class.
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