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intersection union and difference of arraylists in java

2013-12-01

azim58 - intersection union and difference of arraylists in java for search purposes: union intersection subtraction of lists or sets in java use the retain all, remove all, and addall methods Example ArrayList list1 = useful_tools.stringWithCommasToArrayList("2,5,8"); ArrayList list2 = useful_tools.stringWithCommasToArrayList("3,5,9"); list1.retainAll(list2); list1.removeAll(list2); list1.addAll(list2); System.out.println(list1);
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