迭代器循环数组和遍历Map的三种方式

迭代器循环数组       变量  

   Iterator<Entry<UserEntity, Long>> iter = countTaskOfUserMap.entrySet().iterator();      

       while(iter.hasNext()){      

          Map.Entry entry = (Map.Entry)iter.next();      

          UserEntity key = (UserEntity)entry.getKey();      

          long value = (Long)entry.getValue();      

   }      

遍历Map的三种方法，  

 Set<Entry<String,String[]>>   entrySets = map.entrySet() 

 Set<String>   keySets  = map.keySet(); 

 Collection<String[]>    values    = map.values()