Shevek (shevek) wrote,

Today I learned of the existence of the little used syntax for a conjunctive type bound <T extends Foo & Bar>. It seems that if one is a class and one an interface, the class must be specified first; also as documented, the erasure is the first specified type. This means that you cannot erase to an interface if you need a class in the conjunction.

I have also decided that other than in cases where one is updating a backwards compatible library where strict control of the erasure of an interface is required, this syntax should not be used because there is always a better solution.

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