Swaping two numbers using temporary variable also without temporary variable in java

Hi All, 

Here I am tried swap two numbers using temporary variable also without temporary variable :)

public class swapTwoNos {
   
    public static void main(String[] args){
       
        // Using temporary variable for swapping two numbers        
        int var1=50;
        int var2=100;
        System.out.println("Using temporary variable for swapping two numbers");
        System.out.println("");
        System.out.println(" Before swapping numbers  \n var1 :"+var1+" var2 :"+var2);
        swap(var1,var2); // calling swap function for exchage the values
        withoutTemp(var1,var2);
    }

    private static void swap(int var1, int var2) {
       int temp =var1;
       var1=var2;
       var2=temp;
       System.out.println("After swapping numbers with temporary variable \n var1 :"+var1+" var2 :"+var2);      
    }

    private static void withoutTemp(int var1, int var2) {
      System.out.println("Using temporary variable for swapping two numbers"); 
      System.out.println("");
       var1 = var1 + var2;
       var2 = var1 - var2;
       var1 = var1 - var2;
       System.out.println("After swapping numbers without temporary variable \n var1 :"+var1+" var2 :"+var2);
    }   
   
}

output:

Using temporary variable for swapping two numbers

 Before swapping numbers 
 var1 :1 var2 :2
After swapping numbers with temporary variable
 var1 :2 var2 :1



Using without temporary variable for swapping two numbers

 After swapping numbers without temporary variable
 var1 :2 var2 :1