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Editorial Team
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Asked: 2026-06-03T02:28:35+00:00

What happens when I do this: List<Integer> listA = new ArrayList<Integer>(); List<Integer> ListB =

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What happens when I do this:

List<Integer> listA = new ArrayList<Integer>();
List<Integer> ListB = new ArrayList<Integer>();

listA = ...filled with some data...
listB = ...filled with some other data...

listA.clear();
listA = listB;

Does values copies or just re-reference? If I now (after this code) call listA.clear() again, will listB clear as well?

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1 Answer

  1. Editorial Team

    Well, after listA = listB the variable listA references the same list as listB. There is no copy-constructor in Java like you have it in C++ etc.

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