interface(drawable).java

interface Drawable{
    void draw();
}

class Rectangle implements Drawable{
    public void draw(){System.out.println("drawing rectangle");}
}

class Circle implements Drawable{
        public void draw(){System.out.println("drawing Circle");}
}

class testInterface{
    public static void main(String args[]){
        Drawable d= new Circle();
        d.draw();
    }
}