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Asked: 2026-05-20T06:01:59+00:00

I have a class that essentially wraps a list, and lists apparently can’t have

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I have a class that essentially wraps a list, and lists apparently can’t have hash values. My idea was to generate a random number and store that as the hash value.

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  1. Editorial Team

    Not a good idea. The general contract of hash code is that if Object A equals Object B, A.hashCode() equals B.hashCode(). With what you’re proposing this wont hold.

    You could try using

    • list length as the hash code
    • hash code of the first item in the list as the hashcode
    • sum of all hashcodes of all items as the hashcode

    or something else along these lines.

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