To Swap 2 numbers

 //To swap 2 numbers

import java.util.*;

class Prog
{
  public static void main(String args[ ])
  {
    Scanner ob =new Scanner (System.in);

    System.out.print("Enter the numbers:");
    int x=ob.nextInt( ) ;
    int y=ob.nextInt( ) ;

   System.out.println("Before Swapping value of  First variable :"+x);
   System.out.println("Before Swapping value of  Second variable :"+y);


   y=y+x - (x=y);

   System.out.println("After Swapping value of  First variable :"+x);
   System.out.println("After Swapping value of  Second variable :"+y);

   }

}