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javaclassgenericsgeneric-collections

"> expected" error on creating a class with generics

I am creating a class with Generics

public class MyEntry<K,Set<V extends SpecificEntry>> extends TimerTask{
//
}

But this is generating an error > expected As I see, the diamond operator is closed properly

If I make it 

public class MyEntry<K,Set> extends TimerTask{
//
}

It works, but I want the second argument to be a set of a specific type.

What should be done to get this right?

Solution

  • If you want the second generic parameter to be a Set of a given type you need:

    public class MyEntry<K,V extends Set<? extends SpecificEntry>> extends TimerTask

    BTW, public class MyEntry<K,Set> extends TimerTask doesn't work the way you think. Set in your case is the name of the second generic type parameter, and has no relation to java.util.Set.