Using Interfaces Labs

Classes for these labs are in com.example.interfaces.labs.shapes. We will create and use an interface to give classes a common type and behavior.

Create an interface named Drawable with the void method draw declared inside of it.

(Solution: Drawable.java)

Retrofit Shape to implement Drawable, putting the actual implementation code in Rectangle and Circle. Don't worry about doing any graphics for drawing, just print out a simple message indicating the type and area of each shape you are "drawing."

(Solutions: Shape.java, Circle.java, Rectangle.java)

Create a tester program to store an array of Drawable objects, adding some Circle and Rectangle objects to it. Call the draw method on each.

(Solution: DrawableTester.java)

Create a class named Text that implements Drawable and has a String field called value. Add getters and setters, as well as an appropriate constructor. Have Text's draw method print the value field. Modify your tester program so that a Text object is added into the array in addition to the Shape objects.

(Solutions: Text.java, DrawableTester2.java)