Given:
1. public class Boxer1{
2. Integer i;
3. int x;
4. public Boxer1(int y) {
5. x = i+y;
6. System.out.println(x);
7. }
8. public static void main(String[] args) {
9. new Boxer1(new Integer(4));
10. }
11. }
What is the result?
A.
The value 4 is printed at the command line.
B.
Compilation fails because of an error in line 5.
C.
Compilation fails because of an error in line 9.
D.
A NullPointerException occurs at runtime.
E.
A NumberFormatException occurs at runtime.
F.
An IllegalStateException occurs at runtime.
Explanation:
Exception in thread “main” java.lang.NullPointerException
at Boxer1.<init>(Main.java:5)
at Boxer1.main(Main.java:9)