CODEWITHSUNDEEP
javagenericssubclass
Al Wld
Al Wld

Reputation: 939

Nested generic subtyping

I am trying to do something like this:

public class MyClass <T extends AbstractClass<K extends ConcreteClass>>

I get an Unexpected bound error for K extends GenericJson, and I am not sure why.

Any help would be appreciated.

Thanks

Upvotes: 0

Views: 72

Answers (2)

Yauhen Sedliarou
Yauhen Sedliarou

Reputation: 1

It depends on what purpose are you trying to reach. Also, you can try to make it so:

public class MyClass <T extends AbstractClass<K>, K extends ConcreteClass> { }

Upvotes: 0

Jorn Vernee
Jorn Vernee

Reputation: 33885

The syntax to use is just a little different:

public class MyClass <K extends ConcreteClass, T extends AbstractClass<K>>

Or, if you don't care about K:

public class MyClass <T extends AbstractClass<? extends ConcreteClass>>

Upvotes: 4

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