Problems

Auto unboxing

Q. Which one is corrent?

Integer i = null;
if (i == 0) {
    System.out.println("Zero");
} else {
    System.out.println("Not Zero");
}

1. Zero
2. Not Zero
3. Throws Exception
4. None of above

Use Objects.equals(Object, Object) to compare objects.

Ref: JLS 15.21.1 Numerical Equality Operators == and !=