ObjectOrientedusingJava/SCAbstract1.java at main · anilantony/ObjectOrientedusingJava · GitHub

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abstract class Shape
{
   abstract public double perimeter();
   abstract public double area();
}

class Circle extends Shape
{
    double radius;

    public double perimeter()
    {
        return 2*Math.PI*radius;
    }
    public double area()
    {
        return Math.PI*radius*radius;
    }

}

class Rectangle extends Shape
{
    double length;
    double breadth;

    public double perimeter()
    {
        return 2*(length+breadth);
    }
    public double area()
    {
        return length*breadth;
    }

}

public class SCAbstract1
{
    public static void main(String[] args)
    {
        Rectangle r=new Rectangle();
        r.length=10;
        r.breadth=5;
        Circle c=new Circle();
        c.radius=15;
        Shape s=c;
        System.out.println(s.area());
        }
}