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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