Problem create List E []

Question

Hello. Got problems when I try to create one "Array" filled with "List" as type. Tried:
List<E>[] name = List<E>[size]; (Compilation problem)
and
List<E>[] name = (List<E>[])(new Object[size]) (cannot cast object to list)Got any suggestions?

Answer 1

Hunter78 wrote:
Thanks. It seems to compile but now I recive "NullPointerException" when I try to add anything into the list. Any idea why?
Example:
public void method(E e){
List<E>[] name = (List<E>[])new List[size];
List list = name[0];
list.add(e);     (NullPointerException)
}edit: using array becouse it�s most naturale when the size is known.Umm... have you ever used arrays of references before? "name" is an array of references, because List is a reference type (everything that is not a primitive type is a reference type). So when you create the array, it is initialized with null references (the default value for references). i.e. the references don't point to any object. So you have no List object to add anything to. It's the same reason why this won't work:
List foo = null;
foo.add(e);