What Will Be The Output Of The Following Java Code P Pre #554

 import java.util.*; public class Main { int a, b; Main(int a, int b) { this.a = a; this.b = b; } Main(Main s) { a = s.a; b = s.b; } public static void main(String[] args) { Main x = new Main(20, 40); Main y = x; Main z = new Main(x); z.a = 15; System.out.println(x.a); } }