Swapping two variables without using third variable in java

Java code to swap two numbers without using temporary variable

import java.io.*;

class Test {

     public static void main(String[] args) throws IOException {

             

          int a,b;

          System.out.println("Enter first number:");

          BufferedReader br1=new BufferedReader(new InputStreamReader (System.in));

          a=Integer.parseInt(br1.readLine());

          System.out.println("Enter second number:");

          BufferedReader br2=new BufferedReader(new InputStreamReader (System.in));

          b=Integer.parseInt(br2.readLine());

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

             

          //process one

          a=b+a;

          b=a-b;

          a=a-b;

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

             

        //process two

          a=5;

          b=10;

         

          a=a+b-(b=a);

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

             

        //process three

          a=5;

          b=10;

         

          a=a^b;

         b=a^b;

          a=b^a;

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

       //process four

        a=5;

        b=10;

       

        a=b-~a-1;

        b=a+~b+1;

        a=a+~b+1;

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

     }

}

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