Java如何对HashMap按值进行排序--非String int 类型时
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
