Difference between Method Overloading and Method Overriding in Java.

Question

Hi Friends I want to know What is difference between Method Overloading and Method Overriding in Java. Please explain it with example. Thank you.

Satyapriya Nayak · Answer

Hi vipendra Method overloading: Normal 0 It is a process of using several procedures with the same name but having different signatures. The signature changes in number of parameters type of parameter and order of parameter. Memory can be saved by implementing method overloading Ex: class OverloadDemo { void triangleArea(float base float height) { float area; area = base height / 2.0f; System.out.println(Area =  + Area); } void triangleArea(float side1 float side2 float side3) { float areas; s = (side1 + side2 + side3) / 2.0; area = Math.sqrt(s(s-side1) (s-side2) (s-side3) ); System.out.println(Area =  + area); } } class MainOverloadDemo { public static void main(String args[]) { OverloadDemo ovrldDemo = new OverloadDemo(); ovrldDemo.triangleArea(20.1258.36); ovrldDemo triangleArea(63.1254.2695.24); } } Method overriding :- It is the process of writing functionality for methods with same signature and return type both in super class and subclass The uses of method overriding: Time to invest method signature is reduced Different functionality in both super class and sub class by sharing same signature.The functionality can be enhanced.The behavior can be replaced in the sub class Ex:- class Super { int sum; A(int num1 int num2) { sum = a+b; } void add() { System.out.println(Sum :  + sum); } } class Sub extends Sub { int subSum; Sub(int num1 int num2 int num3) { super(num1 num2); subSum = num1+num2+num3; } void add() { super.add(); System.out.println(Sum of 3 nos :  +subSum); } } Difference between overloading and overriding Overloading Two methods have same name with different type or number of parameters A relationship between methods is available in the same class Inheritance does not blocked by method overloading One method can overload unlimited number of times Only method name can be reused Overriding A method of super class is redefined in the sub class A relationship between methods is available in the super class and its sub class Method overriding blocks the inheritance Method overriding can be done only once per method in the sub class The complete method signature can be reused Also Please refer the below links http://www.xyzws.com/Javafaq/what-are-method-overloading-and-method-overriding/22 http://www.javatpoint.com/sonoojaiswal/method-overriding-in-java Thanks

Senthilkumar · Answer

Hi You can go through this link for good explaaination with suitable examples. http://javarevisited.blogspot.com/2011/12/method-overloading-vs-method-overriding.html http://www.tutorialized.com/view/tutorial/Difference-between-Method-Overloading-and-Method-Overriding-in-Java/73790