[Solved] Which statement about wrapper class methods is TRUE? — Ans: valueOf methods can return cached objects for some values | Java

Java - Wrapper Classes

Which statement about wrapper class methods is TRUE?

AvalueOf methods always return primitive types

BparseXxx methods return wrapper objects

CvalueOf methods can return cached objects for some values

DparseXxx methods throw NullPointerException on null input

Step-by-Step Solution

Solution:

Step 1: Understand valueOf method behavior
valueOf methods return wrapper objects, sometimes cached for efficiency (e.g., Integer between -128 and 127).
Step 2: Check parseXxx and exception behavior
parseXxx methods return primitives, not objects. They throw NumberFormatException on null, not NullPointerException.
Final Answer:
valueOf methods can return cached objects for some values -> Option C
Quick Check:
valueOf caches some wrapper objects [OK]

Quick Trick: valueOf caches small values, parseXxx returns primitives [OK]

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