比如：Float  可以通过相减 取整返回，如下方：

Map<String, Float> PathMap = new HashMap<String, Float>();//排序 map//将map.entrySet()转换成list
List<Map.Entry<String, Float>> list = new ArrayList<Map.Entry<String, Float>>(PathMap.entrySet());

System.out.println("------- 转换前");for (Map.Entry<String, Float>mapping : list) {

    System.out.println(mapping.getKey()+ "\t" +mapping.getValue());

}



System.out.println("------- 转换后");

Collections.sort(list,new Comparator<Map.Entry<String, Float>>() {//降序排序
    public int compare(Map.Entry<String, Float> o1, Map.Entry<String, Float>o2) {//return o1.getValue().compareTo(o2.getValue());
        return  Math.round((o2.getValue()-o1.getValue())*100000);

    }

});for (Map.Entry<String, Float>mapping : list) {

    System.out.println(mapping.getKey()+ "\t" +mapping.getValue());

}

Java如何对HashMap按值进行排序_上善若水，水善利万物而不争。-CSDN博客
https://blog.csdn.net/xifeijian/article/details/46522531

完美解决Collections.sort对double不能排序问题_Deep Learning and NLP Farm-CSDN博客
https://blog.csdn.net/appleml/article/details/41315429

java.util.Arrays.sort(float[])方法实例 - Java.util包 | 速学堂教程 - 学的不仅是技术，更是梦想！--尚学堂旗下高端品牌
https://www.sxt.cn/util/arrays_sort_float.html

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