i dont understand the code the relation between x and y

package com.codegym.task.task01.task0107; /* No comments needed */ public class Solution { public static void main(String[] args) { int x = 2; int y = 12; // y = x * y; y = x + y; x = y - x; y = y - x; System.out.println(x); System.out.println(y); } }