How do I join two lists in Java?

Question

Conditions: do not modifiy the original lists; JDK only, no external libraries. Bonus points for a one-liner or a JDK 1.3 version.

Is there a simpler way than:

Answer 1

Off the top of my head, I can shorten it by one line:

List newList = new ArrayList(listOne);
newList.addAll(listTwo);