Java Programming Tutorial OOP Exercises 1. Exercises on Classes 1.1 Ex: The Circle class (An Introduction to Classes and Instances) This exercise shall lead you through all the bosic concepts in OOP Circle varName:type defauft-value _radus : double= 1.0 ..--denotes private access color:String "red" +denotes public access Circle) Circle(r:double) +getRadius():double +getArea():double tmethodName (parmName:type,..) retunType A class called circle is designed as shown in the following class diagram. It contains: . Two private instance variables: radius (of the type double) and color (of the type String), with default value of 1.8 and"red", respectively. Two overloaded constructors a default constructor with no amnt and a constructor which takes a double argument for radius. Two public methods: getRadius () and getArea(), which return the radius and area of this instance, respectively. WRITE THE CIRCLE SOURCE CODE AND CIRCLE DRIVER CLASS