Abstract class having constructor, data member, methods etc.

Java Programming Language Polymorphism in Java (Article) Polymorphism in Java (Program)

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Program:

 //example of abstract class that have method body
 abstract class Parent{
   Parent(){
	   System.out.println("I am constructor of Parent class");
	   }

   abstract void abstractMethod();

   void nonAbsract(){
	   System.out.println("I am non Abstart method");
	   }
 }

 class Child extends Parent{
 	void abstractMethod(){
		System.out.println("This is implementation of abstract method");
		}
 }
 class Abstraction{
 public static void main(String args[]){
  Parent obj = new Child();
  obj.nonAbsract();
  obj.abstractMethod();
 }
}

  
Output:

Output:

I am constructor of Parent class
I am non Abstart method
This is implementation of abstract method
Press any key to continue . . .

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