padma

• Oct 10th, 2005

 

       Redefining  the functionality..

yazhini

 Profile Answers by yazhini Questions by yazhini

• Dec 15th, 2005

 

There is difference between overloading and overriding. In overriding you can add additional parameter to the function of the base class which does not affect the base class.The respective class(base or derived)will be called depending upon the no of parametres. Assume student as a base class and HostelStudent as a derived class class Student { void disp() { int roll; String name; System.out.println( "Roll:"+roll); System.out.println( "Name:"+name); }}class HostelStudent extends Student{ void disp() { super();//name,roll are derived //add a new attribute roomno int rno; System.out.println( "RoomNo:"+rno); } public static void main(String args[]) { HostelStudent h = new HostelStudent(); h.disp(1010,"abc", 12); Student s = new Student(); s.disp(1010,"abc"); }} The main theme is that we can reuse the base class method(using super keyword) and also make modifications in derived class which only affects that derived class