Android HashMap按照键值排序的两种方法

有如下一个 Map 对象：

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

map.put(3,"A");

map.put(2,"B");

map.put(1,"C");

键值排序第一种方法：

Object[] key =  map.keySet().toArray();
Arrays.sort(key);  

for(int i = 0; i<key.length; i++)
{
     Log.i("sang", "value=>"+map.get(key[i]));
}

键值排序第二种方法：

List arrayList = new ArrayList(map.entrySet());

Collections.sort(arrayList, new Comparator()
{
  public int compare(Object arg1, Object arg2)
 {
    Map.Entry obj1 = (Map.Entry) arg1;
    Map.Entry obj2 = (Map.Entry) arg2;
    return (obj1.getKey()).toString().compareTo(obj2.getKey());
  }
});
//将HASHMAP中的数据排序
for (Iterator iter = arrayList.iterator(); iter.hasNext();)
{
   Map.Entry entry = (Map.Entry)iter.next();
   String  key = (String)entry.getKey();
   Log.i("sang","value =>"+map.get(key));
}