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Areas.java
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Areas.java
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abstract class Shape{
int i,j;
public abstract void area();
public Shape(int i,int j){
this.i=i;
this.j=j;
}
}
class Rectangle extends Shape{
public Rectangle(int i,int j){
super(i,j);
}
public void area(){
System.out.println("Area of rectangle is : "+super.i*super.j);
}
}
class Triangle extends Shape{
int k;
public Triangle(int i,int j,int k){
super(i,j);
this.k = k;
}
public void area() {
int s = (super.i + super.j + k)/2;
System.out.println("Area of triangle is : "+Math.sqrt( s*(s-super.i)*(s-super.j)*(s-k)));
}
}
class Circle extends Shape{
public Circle(int i){
super(i,0);
}
public void area() {
System.out.println("Area of Circle is : "+Math.PI*super.i*super.i);
}
}
public class Areas {
public static void main(String[] args){
Rectangle r = new Rectangle(4,6);
Triangle t = new Triangle(3,4,5);
Circle c = new Circle(1);
}
}