“Site: la liste stackoverflow.com est abstraite; ne peut pas être une liste publique instanciée” Réponses codées

Site: la liste stackoverflow.com est abstraite; Impossible d'être instancié publique List result = new list <> ();

In Java, List is an interface. That is, it cannot be instantiated directly.

Instead you can use ArrayList which is an implementation of that interface 
that uses an array as its backing store (hence the name).

Since ArrayList is a kind of List, you can easily upcast it:

List<T> mylist = new ArrayList<T>();

-source: stackoverflow.com