guava 创建自定义multimap

/** * Created by jianjun.yu on 15-4-22. */public class MultimapUtils {    //创建简单treeMultiMap, key有序， value为普通arrayList(guava 自带treeMultiMap，value是有序,并且为set继承类)    public static <Key, Value>Multimap<Key, Value> createSimpleTreeMultimap() {        return Multimaps.newListMultimap(new TreeMap<Key, Collection<Value>>(), new Supplier<List<Value>>() {            @Override            public List<Value> get() {                return Lists.newArrayList();            }        });    }}