import com.google.common.collect.*; public class GoogleCollectionsExample { public static void main(String[] args) { ListMultimap<String, Integer> multimap = ArrayListMultimap.create(); multimap.put("A", 1); multimap.put("A", 2); multimap.put("B", 3); multimap.put("C", 4); multimap.put("C", 5); for (String key : multimap.keySet()) { for (Integer value : multimap.get(key)) { System.out.println(key + ": " + value); } } ImmutableList<Integer> filteredList = multimap.values() .stream() .filter(value -> value > 2) .collect(ImmutableList.toImmutableList()); System.out.println("Filtered List: " + filteredList); } }