Java · Junior · Coding

There's a class Point with two integer fields, x and y. Override its equals and hashCode methods so that points with the same coordinates are considered equal and work correctly as keys in a HashMap.

~15 min by voice

How to approach it

The interviewer wants to see whether you understand the equals/hashCode contract and how a HashMap looks up keys: first it picks a bucket by hashCode, then it compares using equals. Plus basic care: overriding rather than overloading, handling null and checking the type, immutable fields.

Have you seen this question in a real interview?

Answers0

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Topics

equals hashcode

Answer by voice

The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.

Best with headphones · ~15 min