BELUGA BEHR created COLLECTIONS-666:
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Summary: ListUtils Union Method
Key: COLLECTIONS-666
URL: https://issues.apache.org/jira/browse/COLLECTIONS-666
Project: Commons Collections
Issue Type: Improvement
Affects Versions: 4.2
Reporter: BELUGA BEHR
Priority: Trivial
{code}
public static <E> List<E> union(final List<? extends E> list1, final List<?
extends E> list2) {
final ArrayList<E> result = new ArrayList<E>(list1);
result.addAll(list2);
return result;
}
{code}
Maybe we should create the _result_ list with the size of list1 + list 2, then
perform two add all. This will prevent the ArrayList from being re-sized on
the addAll step.
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