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Inheritance.java
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Inheritance.java
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import java.util.*;
//Base Class/Parent Class/ Super Class
class Circle{
public float radius;
public double area(){
return Math.PI * radius *radius;
}
public double perimeter(){
return 2*Math.PI*radius;
}
}
//Derive Class/Child Class/ Sub Class
class Cylinder extends Circle{
public double height;
public double volumn(){
return area()*height;
}
}
//Parameterised Constructor in Inheritance
class Parent
{
Parent(){
System.out.println("Without Parameter in Parent");
}
Parent(int x){
System.out.println("Only one parameter in Parent " +x);
}
Parent(int y,int z){
System.out.println("Two Parameter in Child "+y+ " " +z);
}
}
class Child extends Parent
{
Child(){
System.out.println("Without Parameter in Child");
}
Child(int m){
super(m);
System.out.println("Only One Parameter in Child");
}
Child(int n,int k){
super(n,k);
System.out.println("Two Parameter in Child "+n+ " " +k);
}
}
public class Inheritance {
public static void main(String[] args){
Circle c1=new Circle();
Cylinder c2=new Cylinder();
c2.radius=10;
c2.height=20;
System.out.printf("\n\n");
System.out.println("perimeter " +c2.perimeter());
System.out.println("area " +c2.area());
System.out.println("volumn " +c2.volumn());
System.out.printf("\n\n");
Child c3=new Child();
System.out.printf("\n\n");
Child c4=new Child(20);
System.out.printf("\n\n");
Child c5=new Child(10,20);
System.out.printf("\n\n");
}
}