abstraction.java

abstract class shape
{
abstract void draw();
}
class rectangle extends shape
{
    void draw()
    {
        System.out.println("rectanle is drawn");
    }
}
class circle extends shape{
    void draw()
    {
        System.out.println("circle is drawn");
    }
}
public class abstraction
{
    public static void main(String[] args) 
    {
        shape s1=new circle();
        s1.draw();
    }
}