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Home/ Questions/Q 7687139
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Editorial Team
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Editorial Team
Asked: May 31, 20262026-05-31T19:38:10+00:00 2026-05-31T19:38:10+00:00

I am creating a class that implements java.util.List . My class is using E

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I am creating a class that implements java.util.List. My class is using E to represent the parameterized type.

I want to call Collections.sort to sort the internal list I’m wrapping with my class. The problem is that this requires my list to have types that implement comparable.

Like the sort method, I want to be able to take a comparator, so I don’t want to force E to be a subclass of Comparable. So, in the constructor that doesn’t take a comparator, I want to verify that E implements Comparable.

So, how do I do this, O mighty java wizards?

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  1. Editorial Team
    Editorial Team
    2026-05-31T19:38:12+00:00Added an answer on May 31, 2026 at 7:38 pm

    No good way to do this. Just closing and moving on.

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