Abstractclasses.java

//Method Which takes the value and does not perform Anything......
abstract class Parent2{ //abstract class is the class which contains abstract method...
//Abstract classes can have both concrete and abstract functions	
	public Parent2(){
		System.out.println("I am the constructor of this class Parent2");
	}
	abstract  void greet();//override greet method by itself and put whatever u wanna put
	abstract void lunch();
}
//Abstract class is the class via help which create another abstract classes..

class child2 extends Parent2{//Implementing inheritance and data abstraction.......
	@Override
	public void greet() {
		System.out.println("Hi,Good mornig da how are u ,");
	}
	@Override
	public void lunch() {
		System.out.println("What do u like to have in lunch ");
	}
}
abstract class child3 extends Parent2{//Either make the class abstract or override greed method 
	public void m() {
		System.out.println("Have Some milk");
	}
}
public class Abstractclasses {

	public static void main(String[] args) {
		//we cann't create objects of abstract class(Cannot make object of parent2)
		child2 c=new child2();//concrete class
		c.greet();
		c.lunch();
		
		
		 
	}

}