Java: equals and hashCode in Collections

What if you only override equals without hashCode?

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Java: equals and hashCode in Collections

Why is hashCode critical for performance in large collections?

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Java: equals and hashCode in Collections

What role does equals play in a HashSet?

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Java: equals and hashCode in Collections

How does object mutation affect HashMap keys?

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Java: equals and hashCode in Collections

Why do `HashSet` and `HashMap` care about `equals` and `hashCode`?

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