Programming Tips - How can I concatenate two ArrayLists?

Date: 2012nov2 Language: java Keywords: add, attach, join Q. How can I concatenate two ArrayLists? A. Here's a method that does that:
ArrayList<String> concat(ArrayList<String> a, ArrayList<String> b) { ArrayList<String> out = new ArrayList<String>(); out.addAll(a); out.addAll(b); return out; }