package Abstract;

//if a class is having even a single method as abstract

//the class must be declared as abstract

abstract class Super{

public Super(){

System.out.println("Calling constructor");

}

public void method1(){

System.out.println("method1() --> Called");

}

abstract void method2(); // abstract method

}

//Inheritance

class Sub extends Super{

@Override

void method2() {

System.out.println("abstract method2() --> Called ");

}

}

public class Abstract {

public static void main(String[]args){

//We can create reference of abstract classes ,but we can't initialize their object

Super s;

Sub obj = new Sub();

obj.method1();

obj.method2();

s = new Sub();

s.method1();

s.method2();

}

}