Is there a standard Java List implementation that doesn't allow adding null to it?

Question

Say I have a List and I know that I never want to add null to it. If I am adding null to it, it means I\'m making a mistake. So every time I would

Answer 1

Although this problem sort of yells "delegate", it's much easier with subclassing since you intend to inherit almost all the same functionality.

class MyList extends List {

  //Probably need to define the default constructor for the compiler

  public add(Object  item) {
    if (item == null) throw SomeException();
    else super.add(item);
  }    

  public addAll(Collection c) {
    if (c.contains(null)) throw SomeException();
    else super.addAll(c);
  }
}