Map的常见遍历方式

 Map<String,String>map=newHashMap();

 for(Map.Entryentry:map.entrySet()){

 Objectkey=entry.getKey();

 }

 Maphashmap=newHashMap();

 Setset=hashmap.entrySet();

 Iteratoriterator=set.iterator();

 while(iterator.hasNext(){

 Map.Entrymapentry=(Map.Entry)iterator.next();

 System.out.println(mapentry.getkey()+"/"+mapentry.getValue());

 }

 Setkeys=map.keySet();

 if(keys!=null){

 Iteratoriterator=keys.iterator();

 while(iterator.hasNext()){

 Objectkey=iterator.next();

 Objectvalue=map.get(key);

 }

 }