Core Java · interview question
How would you explain a common mistake when implementing equals and hashCode that can lead to incorrect Set behavior in an interview?
Multiple choiceMediumchapter-4-curatedpremiumcore-javaequals-and-hashcode-in-collections
Answer and explanation
Correct answer
C. Using mutable fields in equals and hashCode.
Why
Using mutable fields in equals and hashCode can lead to incorrect behavior if the fields change after the object is added to a Set. This can result in inconsistent behavior and duplicate entries.
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