4. Every circle has a center and a radius. Given the radius, we can determine the circles area and circumference. Given the center, we can determine its position in the x-y plane. The center of a circle is a point in the x-y plane. Design the class Circle that can store the radius and center of the circle. Because the center is a point in the x-y plane and you designed the class to capture the properties of a point in Programming Exercise 3, you must derive the class Circle from the class Point. You should be able to perform the usual operations on a circle, such as setting the radius, printing the radius, calculating and printing the area and circumference, and carrying out the usual operations on the center.

Use 3 as a radius to test the program..

HERE is the program for #4 but I am having trouble creating a program for question #5

public class Circle

{ protected double radius; protected double area; protected double circumference; public Circle() { } public Circle(double rad,double area,double circum) { this.radius = rad; this.area = area; this.circumference = circum; } public void setCircle(double rad,double area,double circum) { this.radius = rad; this.area = area; this.circumference = circum; } public void setRadius(double rad) { radius = rad; } public double getRadius() { return radius; } public double area(double a) { return (22*a*a)/7; } public double circumference(double a) { return 2*22*a/7; } public static boolean equals(Circle a,Circle b) { boolean result=false; if(a.getRadius() == b.getRadius()) result = true; else result = false; return result; } public String toString() { return "Cirlce Radius : "+radius+"Circle Area : "+area+"Circle Circumference : "+circumference; } public static void main(String[] args) { boolean result=false; Circle myCircle=new Circle(5.00,4.00,7.23); Circle yourCircle=new Circle(0.00,0.00,0.00); yourCircle.setCircle(5.00,45.00,82.00); myCircle.setRadius(3);

System.out.println("Circle Radius is : "+myCircle.getRadius()); System.out.println("Area of a circle : "+myCircle.area(myCircle.getRadius())); System.out.println("Circumference of a circle : "+myCircle.circumference(myCircle.getRadius())); System.out.println("--------------------------------------------------"); myCircle.toString();

yourCircle.setRadius(3); System.out.println("Circle Radius is : "+yourCircle.getRadius()); System.out.println("Area of a circle : "+yourCircle.area(yourCircle.getRadius())); System.out.println("Circumference of a circle : "+yourCircle.circumference(yourCircle.getRadius())); System.out.println("--------------------------------------------------"); yourCircle.toString(); result = equals(myCircle,yourCircle); if(result == true)

System.out.println("myCircle and yourCircles are equal"); else System.out.println("myCircle and yourCirlces are not equal"); }

}

5. Every cylinder has a base and height, where the base is a circle. Design the class Cylinder that can capture the properties of a cylinder and perform the usual operations on a cylinder. Derive this class from the class Circle designed in Programming Exercise 4. Some of the operations that can be performed on a cylinder are as follows: calculate and print the volume, calculate and print the surface area, set the height, set the radius of the base, and set the center of the base.