CODEWITHSUNDEEP
javagenericstypes
Logan
Logan

Reputation: 1682

Get Generic Type of Generic Type

If I have 

public abstract class SomeType<T extends SomeOtherType> {}

public class WrapperType<U extends SomeType<T>> {}

Is there a way to modify the latter signature (which is an error 'cannot resolve symbol "T"') so that I can use the generic type in WrapperType, say for List<T> or something analogous?

(If I have posed this question using the wrong terminology, I'd appreciate the corrections.)

Upvotes: 4

Views: 116

Answers (1)

rgettman
rgettman

Reputation: 178263

It's quite simple once you realize what's going on. You didn't define T in the scope of the class WrapperType. Declare it with at least the same bounds as in SomeType.

class WrapperType<T extends SomeOtherType, U extends SomeType<T>> {}

Upvotes: 5

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