abstract _class_java

//the abstract class can not become a object it is features of it.
abstract class shape
{
    void display()
    {

    }
}

class cir extends shape{
    void display()
    {
        System.out.println("shape is circle is right now");
    }
}

class rectan extends shape{
    void display()
    {
        System.out.println("the shape is rectangle");
    }
}
public class abstaract {

    public static void main(String[] args)
    {

        ///abstract class object
        //error like this:'shape' is abstract; cannot be instantiated
        //shape s=new shape();
       // s.display();


        //instance is cir
        shape s =new cir();
        s.display();

        //instance is rectan

        s=new rectan();
        s.display();
    }
}