How to swap two number without using third number in java

How to swap two number without using third number in java
import  java.util.*;
 public class SwapNumber
{
 public static void main(String args[])
    {
      int  a,b;
     Scanner sc=new Scanner(System.in);
     System.out.println("Enter any two Number..");
     a=sc.nextInt();
     b=sc.nextInt();
     a=a+b;
     b=a-b;
     a=a-b;
 
    System.out.println("A="+a+",B="+b);
   }
}
 output:
   Enter any two number..
     5
  10
   A=10, B=5

 Explain..
  here we are add both number first
  a=a+b=5+10=15  then
  b=a-5=15-5=5 then
a=a-b=15-5=10
   so   finally...
  A=10, B=5.