Core Java · interview question
Why does using Integer.valueOf(int) over new Integer(int) matter in practice?
Multiple choiceHardchapter-7-curatedpremiumcore-javawrapper-types-and-autoboxing
Answer and explanation
Correct answer
A. Better performance due to caching
Why
Integer.valueOf(int) uses caching for values between -128 and 127, which means it can reuse existing objects, improving performance and reducing memory usage compared to new Integer(int) which always creates a new object.
Test yourself on Core Java
A free test with instant, explained results. No account needed.
More Core Java questions
- What happens if a class implements two interfaces that have methods with the same signature?
- Given the code snippet below, what will be the result of the comparison using '=='?
- Which of the following variable names is best for storing the total amount in a shopping cart?
- When does a local variable declared inside a method stop existing?
- Which of the following is a checked exception?
- Why might you choose 'int' over 'long' for storing the number of items in a small store's inventory?