HashMap按值递减排序

    @Test
    public void test() {
    
        Map<String, Double> map_Data = new HashMap();
        map_Data.put("A", 98.2d);
        map_Data.put("B", 50.4d);
        map_Data.put("C", 50.2d);
        map_Data.put("D", 25.4d);
        map_Data.put("E", 85.9d);
        System.out.println(map_Data);
        List<Map.Entry<String, Double>> list_Data = new ArrayList<Map.Entry<String, Double>>(map_Data.entrySet());
        Collections.sort(list_Data, new Comparator<Map.Entry<String, Double>>() {
            public int compare(Map.Entry<String, Double> o1, Map.Entry<String, Double> o2) {
                if (o2.getValue() != null && o1.getValue() != null && o2.getValue().compareTo(o1.getValue()) > 0) {
                    return 1;
                } else {
                    return -1;
                }
            }
        });
        System.out.println(list_Data);

    }

Console Output:

{A=98.2, B=50.4, C=50.2, D=25.4, E=85.9}
[A=98.2, E=85.9, B=50.4, C=50.2, D=25.4]