Question

I’m not very skilled in java generics, I must admit. But here’s the problem.
I need to subclass LinkedList to add some (not all) methods typical of a Map. Let’a say I do this way:

public class TalendList<T extends Serializable> extends ArrayList<T>{

    private Map<T, T> map;

    public TalendList(){
        super();
        map = new ConcurrentHashMap<T, T>();
    }

Is this the correct way? Why I cannot do this in my caller code:

List<String> ggg = new TalendList<String>();

but only:

TalendList<String> ggg = new TalendList<String>();

?

Answer 1

This is happening because you are importing:

import java.awt.List:

instead of:

import java.util.List;

The awt type of List doesn’t support the parameterizing, and it is not a generic collection.