How To Perform Method Overloading In Java

Method overloading is one of the most amazing feature of OOP method overloading in java can be defined as  a class having more than one method having same name but having different input parameters.Its make easier for user because if user uses different names for all method program will become difficult for a user to understand program.Lets discuss what are require for method overloading.

HOW TO OVERLOAD METHODS IN JAVA:

Method can be simply be overloaded by using one rule.

• Number of input parameter of method should be different from others.As we done in below program.

EXAMPLE:

void input()

void input(int a)

• Parameter data type should be different from others for example if one method takes double so other should not use double data type as a parameter.

EXAMPLE:

void input(double a)

void input(int a)

NOTE:Method can not be overloaded by changing return type of method.

CODING:

class overloading

{

void input()

{

System.out.println("No Parameter");

}

//overload method for one parameter 

void input(int a)

{

System.out.println("a="+a);

}

//overload method for two parameter 

void input(int a,int b)

{

System.out.println("a = "+a+" b= "+b);

}

//overload method for returning double parameter

double input(double a)

{

System.out.println("Double Value of a="+a);

return a*a;

}

}

class mainoverload

{

public static void main(String arg[])

{

overloading x = new overloading();

//calling all version of input methods

x.input();

x.input(50);

x.input(100,30);

double ans=x.input(123.4567);

System.out.print("Result of x.input(123.4567)="+ans);

}

}

OUTPUT:

No parameter

a = 100 b=30

Double Value of a = 123.4567

Result of x.input(123.4567)=15241.55677489