Program:-
//Q1.Create a class Circle and use inheritance to create another class Cylinder from it.
//Q2.Create a class Rectangle and use inheritance to create another class cuboid. try to keep it as close to real
// world scenario as possible.
//Q3.Create methods for area and volume in Q1.
//Q4.Create method for area and volume in Q2. also create getter and setter.
//Q5.what is the area of constructor execution for the following inheritance hierarchy.
/*
Base
|
Derived1
|
Derived2
Derived2 obj = new Derived();
Which Constructors will be executed and in what order.
*/
//Q1,Q3
class Circle1{
public int radius;
Circle1(int r){
this.radius = r;
System.out.println("I am a constructor form Circle1");
}
public double area(){
return Math.PI*this.radius*this.radius;
}
}
class Cylinder1 extends Circle1{
int height;
Cylinder1(int r, int h){
super(r);
this.height = h;
System.out.println("I am a constructor from Cylinder1");
}
public double area(){
return 2*Math.PI*this.radius*(this.radius=this.height);
}
public double volume(){
return Math.PI*this.radius*this.radius*this.height;
}
}
//Q2.Q4.
class Rectangle01{
public int length;
public int width;
public int getLength() {
return length;
}
public void setLength(int length) {
this.length = length;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
Rectangle01(){
System.out.println("I am a constructor from Rectangle01");
}
public double area(){
return this.length*this.width;
}
}
class Cuboid extends Rectangle01{
public int length;
public int width;
public int height;
public int getLength() {
return length;
}
public void setLength(int length) {
this.length = length;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
public double SurfaceArea(){
return 2*this.length*this.width + 2*this.width*this.height + 2*this.length*this.height;
}
public double Volume(){
return this.length* this.width* this.height;
}
Cuboid(){
System.out.println("I am a constructor form Cuboid");
}
}
public class PracticeSet10V53 {
public static void main(String[] args) {
//Q1,Q3.
Cylinder1 obj = new Cylinder1(12,4);
System.out.println("Area of a circle is : "+obj.area());
System.out.println("Area of a cylinder is :"+obj.area());
System.out.println("volume of a cylinder is : "+obj.volume());
System.out.println();
//Q2,Q4.
Cuboid obj1 = new Cuboid();
obj1.setLength(4);
obj1.setWidth(6);
obj1.setHeight(3);
System.out.println("The area of cuboid is : "+ obj1.SurfaceArea());
System.out.println("The volume of cuboid is : "+ obj1.Volume());
}
}
