I need a shallow copy of an java ArrayList, should I use clone() or iterate over original list and copy elements in to new arrayList, which is faster ?
ArrayList
clone()
No need to iterate:
List original = ... List shallowCopy = new ArrayList(original);
http://java.sun.com/javase/6/docs/api/java/util/ArrayList.html#ArrayList%28java.util.Collection%29
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