1. IS-A relationship is also known as ‘ http://www.youthandfamilyconnections.org/?pindyk=%D8%A7%D9%84%D8%AE%D9%8A%D8%A7%D8%B1%D8%A7%D8%AA-%D8%A7%D9%84%D8%AB%D9%86%D8%A7%D8%A6%D9%8A%D8%A9-%D8%A7%D9%84%D8%AA%D8%B7%D8%A8%D9%8A%D9%82%D8%A7%D8%AA&4fd=ac الخيارات الثنائية التطبيقات Inheritance‘.
  2. By using extends keyword we can implement inheritance.
  3. The main advantage is re-usability.What ever parent has by default available to the child.i.e without rewriting, child class is allowed to use parent class functionality.

بورصه الكويت اسهم فيفا

http://annasandomierz.pl/?semechkapl=handel-kursami&57c=50 handel kursami class Parent{ public void m1(){ System.out.println("Parent:m1() method"); } } class Child extends Parent{ public void m2(){ System.out.println("Child:m2() method"); } } public class Test { public static void main(String[] args) { Parent p1=new Parent(); p1.m1(); //p1.m2()//invalid Child c=new Child(); c.m1(); c.m2(); Parent p2=new Child(); p2.m1(); //p2.m2();//Invalid } }

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