Java 将Map按Value值降序排列

 1 /**
 2      * 将集合按照降序排列-FLOAT
 3      * @param nowPartTwoData
 4      * @return
 5      */
 6     private static  List<Map.Entry<String,Float>> sortByValueFloatDesc(Map<String, Float> nowPartTwoData){
 7         //这里将map.entrySet()转换成list
 8         List<Map.Entry<String,Float>> list = new ArrayList<Map.Entry<String,Float>>(nowPartTwoData.entrySet());
 9         //然后通过比较器来实现排序
10         Collections.sort(list,new Comparator<Map.Entry<String,Float>>() {
11             //降序排序
12             @Override
13             public int compare(Map.Entry<String, Float> o1,
14                                Map.Entry<String, Float> o2) {
15                 return o2.getValue().compareTo(o1.getValue());
16             }
17         });
18
19         return list;
20     }