write a java program that implements the following classes:

write a java program that implements the following classes: A) a) Point in the Cartesian coordinate system. b) Circle with a given center and radius c) Cylinder with a given center, radius and heigth. d) Sphere with a given center and radius

The super class is the point class. circle is a subclass of the point class and cylinder and spere are subclasses of the circle class. All these classes should implements the following methods

1)getArea() method. 2)getVolume() method.

B)A class Called: RandomNumberGenerator that generate random numbers from 1 to 100

C)A class Test that tests the hierarchy in A) especiaaly the getArea() and getVolume() methods. Use an object from the Random NumberGenerator class to generate your input test data.

View Answers

June 3, 2013 at 11:17 AM

/**
 * @author JavaWithUs 
 * www.javawithus.com
 */
class Point {

    int x;
    int y;

    public Point(int x, int y) {
        this.x = x;
        this.y = y;
    }
}

class Circle extends Point {

    int radius;

    public Circle(int x, int y, int radius) {
        super(x, y);
        this.radius = radius;
    }

    public double getArea() {
        return Math.PI * radius * radius;
    }
}

class Cylinder extends Circle {

    int height;

    public Cylinder(int x, int y, int radius, int height) {
        super(x, y, radius);
        this.height = height;
    }

    public double getVolume() {
        return getArea() * height;
    }

    @Override
    public double getArea() {
        return super.getArea() * 2 + (2 * Math.PI * radius * height);
    }
}

class Sphere extends Circle {

    int z;

    public Sphere(int x, int y, int z, int radius) {
        super(x, y, radius);
        this.z = z;
    }

    @Override
    public double getArea() {
        return 4 * Math.PI * radius * radius;
    }

    public double getVolume() {
        return 4 / 3 * Math.PI * Math.pow(radius, 3);
    }
}