Google guava之SetMultimap简介说明

guava之SetMultimap集合简介

SetMultimap集合:
   当key和value都相同时，
   则SetMultimap集合中只存储一条数据 

   如:
    ForwardingSetMultimap, ForwardingSortedSetMultimap, 
	HashMultimap, ImmutableSetMultimap, 
	LinkedHashMultimap, TreeMultimap

public static void main(String[] args) {
        SetMultimap<String, String> multiMap = HashMultimap.create();
        multiMap.put("k1","java265.com-1");
        multiMap.put("k1","java265.com-2");
        multiMap.put("k2","java265.com-3");
        multiMap.put("k3","java265.com-4");
        for (String s : multiMap.keySet()) {
            Collection<String> lastNames = multiMap.get(s);
            System.out.println(lastNames);
        }
    }