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 ?
I need a shallow copy of an java ArrayList , should I use clone()
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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 ?
Use
clone(), or use the copy-constructor.The copy-constructor makes additional transformation from the passed collection to array, while the
clone()method uses the internal array directly.Have in mind that
clone()returnsObject, so you will have to cast toList.