Java排序

Map Stream 排序

最簡單的排序方式

Map<String,String> _lineMap = _itRow.next();


_lineMap = _lineMap.entrySet().stream().
    sorted((i1,i2)>i1.getKey().compareTo(i2.getKey())).
    collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue,
    (e1,e2)->e1,LinkedHashMap::new));

Map 間接排序

通過對key進行排序，實現對map排序。

 static Map<String, Integer> map = new HashMap<>();

  map.put("Jayant", 80);
  map.put("Abhishek", 90);
  map.put("Anushka", 80);


  ArrayList<String> sortedKeys
       = new ArrayList<String>(map.keySet());


Collections.sort(sortedKeys);

for (String x : sortedKeys)
   System.out.println("Key = " + x + ", Value = " + map.get(x));

按照給定的順序排序

1.