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Posted on    March-30-2015 1:04 AM

 Java Java 
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Mayank Tripathi
Mayank Tripathi

Total Post:807

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Posted on    March-30-2015 2:53 AM

If a class have multiple methods by same name but different parameters, it is known as Method Overloading

Suppose we have to perform addition of the given numbers but there can be any number of arguments, if you write the method such as a(int,int) for two parameters, and b(int,int,int) for three parameters then it may be difficult for you as well as other programmers to understand the behavior of the method because its name differs. So, we perform method overloading to fix this issue:

There are two ways to overload the method in java
  1. 1.By changing number of arguments
  2. 2.By changing the data type

1. Method Overloading by changing the no. of arguments:
we have created two overloaded methods, first sum method performs addition of two numbers and second sum method performs addition of three numbers.
class Calculation{  
  void sum(int a,int b){System.out.println(a+b);}  
  void sum(int a,int b,int c){System.out.println(a+b+c);}  
  
  public static void main(String args[]){  
  Calculation obj=new Calculation();  
  obj.sum(10,10,10);  
  obj.sum(20,20);  
  
  }  
}  

Output : 30
             40


2.Method Overloading by changing data type of argument
we have created two overloaded methods that differs in data type. The first sum method receives two integer arguments and second sum method receives two double arguments
class Calculation2{  
  void sum(int a,int b){System.out.println(a+b);}  
  void sum(double a,double b){System.out.println(a+b);}  
  
  public static void main(String args[]){  
  Calculation2 obj=new Calculation2();  
  obj.sum(10.5,10.5);  
  obj.sum(20,20);  
  
  }  
}  

Output:21.0
           40

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