Core Java · interview question

What does the following code snippet, assuming 'Integer.valueOf' is used evaluate to?

Multiple choiceMediumchapter-7-curatedpremiumcore-javawrapper-types-and-autoboxing

java

Integer a = Integer.valueOf(127);
Integer b = Integer.valueOf(127);
System.out.println(a == b);

FalseTrueRandom resultNullPointerException

Answer and explanation

Correct answer

B. True

Integer.valueOf() uses cached Integer objects for values between -128 and 127, so '==' checks reference equality and returns true for these values.

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