Implement a shape hierarchy. you must have your superclass shape and 2 subclasse

Question

Implement a shape hierarchy. you must have your superclass shape and 2 subclasses two-dimensional shape and three-dimensional shape. Under two-dimensional shape, you have other subclasses, circle, square, and triangle. Under the three-dimensional shape you have the sphere, cube, and tetrahedron. Each two-dimensional shape should contain a method getArea to calculate the area of the two-dimensional shape. Each three-dimensional shape should have a method getArea and getVolume to calculate the surface area and volume, respectively, of the three-dimensional shape. Create a program that uses an array of shape references to objects of each concrete class in the hierarchy. The program should print a text description of the object to which each array element refers. Also, in the loop that processes all the shapes in the array, determine whether each shape is a two-dimensional shape or a three-dimensional shape. If a shape is a two-dimensional shape, display it's area. If a shape is a three-dimensional shape, display its area and volume

Explanation / Answer

package Project4; public class Circle extends TwoDimensionalShape{ // declare instance variables Circle (double diameter) { this.diameter = diameter; double radius = diameter / 2.0; this.area = PI * radius * radius; } private static final double PI = Math.PI; private double diameter; private double area; // area of circle public double area () { return area; } public static void main(String[] args) {//declare local variables Circle radius = new ; } }

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