1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 /声明的时候初始化 HashMap hashMap = new HashMap(){ { put("a", 1); put("b", 3); put("c", 2); } }; //sorted by value ArrayList<Map.Entry> l = new ArrayList<Map.Entry>(hashMap.entrySet()); Collections.sort(l, new Comparator<Map.Entry>() { public