![]() ("radius is: " + c4.getRadius()) // Print radius via getter Modify the TestCircle to test these methods, e.g.,Ĭircle c4 = new Circle() // construct an instance of Circle * The Circle class models a circle with a radius and color. The source codes for Circle.java is as follows: /** Two public methods: getRadius() and getArea(), which return the radius and area of this instance, respectively.Two overloaded constructors - a default constructor with no argument, and a constructor which takes a double argument for radius. ![]() Two private instance variables: radius (of the type double) and color (of the type String), with default value of 1.0 and " red", respectively.This first exercise shall lead you through all the basic concepts in OOP.Ī class called circle is designed as shown in the following class diagram. ![]() Exercises on Classes An Introduction to Classes and Instances by Example - The Circle Class
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