public class SwapVars
{
   public static void main(String[] args)
   {
       int a = 1, b = 2;

       int help;      // Helper variable to hold a value 

       // Code to swap values in a and b
       help = a;      // Now a is "free"
       a = b;         // Perform first half of the swap
       b = help;      // Perform second half of the swap     
   }
}