Identify the error in the following code snippet:

medium📝 Debug Q14 of 15

Java - Wrapper Classes

Integer x = null;
int y = x + 5;
System.out.println(y);

ACompilation error due to null assignment

BOutput is 0

COutput is 5

DNullPointerException at runtime

Step-by-Step Solution

Solution:

Step 1: Analyze autounboxing with null wrapper
Variable x is null, so autounboxing to int causes error.
Step 2: Identify runtime exception
Autounboxing null throws NullPointerException at runtime.
Final Answer:
NullPointerException at runtime -> Option D
Quick Check:
Autounboxing null causes NullPointerException [OK]

Quick Trick: Autounboxing null causes NullPointerException [OK]

Common Mistakes:

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