map.put("CBA","cba"); Map<String, String> resultMap = sortMapByKey(map);//按Key进行排序//Map<String, String> resultMap = sortMapByValue(map);//按Value进行排序for(Map.Entry<String, String>entry : resultMap.entrySet()) { System.out.println(entry.getKey() +""+entry.getValue()); }...
*/privateMap<String,Long>sortMapByKey(Map<String,Long>oriMap,final boolean isAsc){Map<String,Long>sortedMap=newLinkedHashMap<String,Long>();if(oriMap!=null&&!oriMap.isEmpty()){List<Map.Entry<String,Long>>entryList=newArrayList<Map.Entry<String,Long>>(oriMap.entrySet());Collections.sort(en...
Map<String, String> resultMap = sortMapByKey(map); //按Key进行排序 // Map<String, String> resultMap = sortMapByValue(map); //按Value进行排序 for (Map.Entry<String, String> entry : resultMap.entrySet()) { System.out.println(entry.getKey() + " " + entry.getValue()); } } /** ...
为它指定对应Compare类,就能够实现对map按Key排序,是在创建map并不断的向当中加入元素的过程中就会完毕排序。 如今我们想要从map中得到水果价格的从低到高的次序输出,该怎样实现呢?换句话说。该怎样实现Map的按Value排序呢? 第一反应是利用stl中提供的sort算法实现,这个想法是好的,不幸的是,sort算法有个限制,利用...
publicclassSortMapByKey{publicstaticvoidmain(String[]args){Map<String,Integer>map=newHashMap<>();map.put("C",3);map.put("A",1);map.put("B",2);TreeMap<String,Integer>sortedMap=newTreeMap<>(map);for(Stringkey:sortedMap.keySet()){System.out.println(key+": "+sortedMap.get(key))...
country=sortByKeys(country); System.out.println("Sorted map by keys :\n"+country); } } DownloadRun Code Output: Sorted map by keys : {China=Beijing, India=New Delhi, Japan=Tokyo, USA=Washington D.C.} 3. Using Java 8 We can also use Java 8 Stream to sort map by keys. Following...
1.根据key键给map排序 public static void main(String[] args) { Map map = new...(key2)); } } 排序结果: 1---Franch 2---Canada 3---China 5...
By default, all key-value pairs inTreeMapare sorted in their natural ordering. To sort Map entries in default natural order, add all entries from the unsortedMapinto theTreeMap. Map<String,Integer>unsortedMap=Map.of("a",1,"c",3,"b",2,"e",5,"d",4);Map<String,Integer>sortedTreeMap...
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= m.end(); it++) { cout << "key = " << it->first << " value = " << it->second << endl; } cout << endl; } void test01() { // Create map container map<int, int>m; m.insert(pair<int, int>(2, 10)); m.insert(pair<int, int>(1, 120)); m.insert(pair<int,...