CODEWITHSUNDEEP
javagenerics
Arnaud Denoyelle
Arnaud Denoyelle

Reputation: 31225

Generics : Specify that parameter must be an interface

I try to do a generic class like this : 

public abstract class MyClass<A extends MyInterface,B,C> implements A{
...
}

(Note: B and C are not interfaces, just other generic params)

I get a compilation error because there is absolutely no guarantee that A is an interface. Hence, the abstract class cannot implements A

Is there a way to tell the compiler that A must be an interface?

Upvotes: 1

Views: 137

Answers (1)

Michal Borek
Michal Borek

Reputation: 4624

No, Since you are using clause which after compilation will have following form like:

public abstract class MyClass implements java.lang.Object {

You can add implements MyInterface, B, C since that would check whether these interfaces are implemented.

Upvotes: 3

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