Swapping 2 numbers

import java.util.*;

class Main
{
	public static void main(String[] args)
	{
		int a,b;

		Scanner sc = new Scanner(System.in);

		System.out.println("Enter integer a:");
		a = sc.nextInt();

		System.out.println("Enter integer b:");
		b = sc.nextInt();

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

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

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