遍历HashMap和HashMap转换成List

 

/*** convert the map to the list(1)*/public static void main(String[] args) {   Map
     
       maps = new HashMap
      
       ();   maps.put("a", "aa");   maps.put("b", "bb");   maps.put("c", "cc");   maps.put("d", "dd");   maps.put("e", "ee");   maps.put("f", "ff");     List
       
         strList = new ArrayList
        
         ();     for (String str : maps.values()) {    strList.add(str);   }     for (int i = 0; i < strList.size(); i++) {       System.out.println(strList.get(i));   }}
        
       
      
     

 

/*** convert the map to the list(2)*/public static void main(String[] args) {   Map
     
       maps = new HashMap
      
       ();   maps.put("a", "aa");   maps.put("b", "bb");   maps.put("c", "cc");   maps.put("d", "dd");   maps.put("e", "ee");   maps.put("f", "ff");     List
       
         strList = new ArrayList
        
         (maps.values());     for (int i = 0; i < strList.size(); i++) {       System.out.println(strList.get(i));   }}
        
       
      
     

 

控制台输出结果：

dd

aa

cc

ff

bb

ee

(HashMap无序排列)