Java tutorial
//package com.java2s; //License from project: LGPL import java.util.Collection; import java.util.HashSet; import java.util.Set; public class Main { public static <T> Set<T> getReunionValues(Collection<? extends T> collectionA, Collection<? extends T> collectionB) { Set<T> newSet = new HashSet<T>(collectionA); newSet.addAll(collectionB); return newSet; } }