java中Map<String,Double>map按照value降序排列

Map<String,Double>map=new TreeMap<String,Double>(); map.put("mit", 3795104.300); map.put("ramin", 6.155); map.put("research", 889.159); map.put("mix", 1.375); map.put("gorgeou", 9.341); map.put("shneiderman", 7.775); List<Entry<String,Double>>lists=new ArrayList<Entry<String,Double>>(map.entrySet()); Collections.sort(lists,new Comparator<Map.Entry<String, Double>>() { public int compare(Map.Entry<String, Double> o1,Map.Entry<String, Double> o2) { double q1=o1.getValue(); double q2=o2.getValue(); double p=q2-q1; if(p>0){ return 1; } else if(p==0){ return 0; } else return -1; } }); for(Map.Entry<String, Double> set:lists){ System.out.println(set.getKey() +" "+set.getValue()); }