Compact way to create Guava Multimaps?

Question

If I want to create a new Multimap with simple defaults, I curently need to do something like:

private final Multimap<Key, Value> providersToClasses = Multimaps         .newListMultimap(                 new HashMap<Key, Collection<Value>>(),                 new Supplier<List<Value>>() {                     @Override                     public List<Value> get() {                         return Lists.newArrayList();                     }                 }); 

...because Java can't infer the correct types if Maps.newHashMap is used for the backing map. Of course, this can be refactored into a separate method, but is there already a way to write it more concisely?

Answer 1

Why aren't you using ArrayListMultimap.create() for such a simple case? It's the default way to create the simple HashMap/ArrayList that is probably the most common used multimap.