Hi Friend,

Try the following code:

class Points{
private double x;
private double y;
public Points(){}
public Points(double x, double y){
this.x=x;
this.y=y;
}
public void setX(double x){
this.x=x;
}
public void setY(double y){
this.y=y;
}
public double getX(){
return x;
}
public double getY(){
return y;
}
public void showCoordinate(){
System.out.println("(X,Y)="+"("+x+","+y+")");
}
}
public class Circle extends Points{
private double r;
public Circle(){}
public Circle(double x, double y, double r){
super(x,y);
this.r=r;
}
public void setR(double r){
this.r=r;
}
public double getR(){
return r;
}
public double area(){
return Math.PI*r*r;
}
public double perimeter(){
return 2*Math.PI*r;
}
public static void main(String args[]){
Circle c = new Circle(12,3,5);
System.out.println(c.getX());
System.out.println(c.getY());
System.out.println(c.getR());
c.setX(100);
c.setY(120);
c.setR(4);
System.out.println(c.getX());
System.out.println(c.getY());
System.out.println(c.getR());
c.showCoordinate();
System.out.println(c.area());
System.out.println(c.perimeter());
}
}

Thanks