Q. What will be the output of the following Java code?
public class Boxer1 
{
    Integer i;
    int x;
   public Boxer1(int y) 
   {
        x = i+y;
        System.out.println(x);
   }
   public static void main(String[] args) 
   {
       new Boxer1 (new Integer(4));
   }
}