Question

Exercise 1:

A circle is defined by its radius (we are not interested in its center). A cylinder is defined by circle and height.

 Design and implement a class called Circle that has the necessary attributes to describe it and at least the following member methods: setRadius( ), getRadius( ), Circumference( ), Area( ), Display( ), and two constructors, one is parameterized constructor and another empty constructor with default zero value.  Design and implement a class called Cylinder that has the necessary attributes to describe it and at least the following member methods: setHeight( ), getHeight( ), setBase(), getBase(), Area( ), Volume( ), Display( ), and two constructors, one is parameterized constructor and another empty constructor with default zero values. Write a test program where you do the following:  Instantiate 2 different objects of type Circle with the following details: o circle1 attributes: 2.5 o circle2 attributes: no details given  Instantiate 2 different objects of type Cylinder with the following details: o cylinder1 attributes: 2.5, 5 o cylinder2 attributes: no details given  Set the data of the second circle to some new data to be read from the keyboard.  Set the data of the second cylinder to some new data to be read from the keyboard.  Print the details of circle1  Print the details of cylinder2  Two cylinders are equivalent if they can hold the same volume. Check if cylinder1 is equivalent to cylinder2.  Two cylinders are the same if they the same volume and the same area. Check if cylinder1 is same to cylinder2.

Hints: Circle area is:  radius2 (use Math.PI) Circle circumference is: 2  radius

Cylinder area is: 2  radius2 + 2  radius height =

2 * Circle area + Circle circumference * height Cylinder volume is:  radius2 height = Circle area * height

Answer 1

/*

*/
package circle;

import static javax.swing.Spring.height;

public class Circle {
int radius;
public int setRadius(){
return radius;
}
public int getRadius(){
return radius;
}
public float Circumference(float r){
return (float) (2*(Math.PI))*r;
}
public float Area(float radius){
return (float) (radius*radius*(Math.PI));
}
public static void Display(){
System.out.print(" ");
}

public static void main(String[] args) {
Circle c=new Circle();
c.Area((float) 2.5);
c.Circumference((float) 2.5);
Circle.Display();
}
public static class Cylinder{
int Height;
int Base;
public int setHeight(){
//int setHeight = 0;
return Height;
}
public int getHeight(){
return Height;
}
public int setBase(){
//int setBase = 0;
return Base;
}
public int getBase(){
return Base;
}

public float Area(float r,float h){
return (float) ((float) (2*(Math.PI))*r*r+(2*(Math.PI))*r*h);
}
public float Volume(float r,float h){
return h*(float)(Math.PI)*r*r;
}
public static void Display(){
System.out.println(" ");
}
public static void main(String []args){
Cylinder c1=new Cylinder();
c1.Area((float) 2.5, 5);
c1.Volume((float) 2.5, 5);
Cylinder.Display();

}
}
}