import com.google.common.collect.ArrayListMultimap; import com.google.common.collect.Multimap; public class MultimapExample { public static void main(String[] args) { Multimap<String, Integer> multimap = ArrayListMultimap.create(); multimap.put("apple", 1); multimap.put("apple", 2); multimap.put("banana", 3); multimap.put("banana", 4); multimap.put("banana", 5); } }