Swap two integer variables with out a third variable Java

SwapInteger.java

public class SwapInteger{

	public static void main(String args[]){
		int a = 5;
		int b = 10;

                System.out.println("Before swapping.");

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

		b = a + b;
		a = b - a;
		b = b - a;

                System.out.println("After swapping.");

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