JAVA遍历HashMap的两种方式

 

Iterator<Entry<Integer, Integer>> it=map.entrySet().iterator();while(it.hasNext()){Entry<Integer, Integer> temp=it.next();System.out.println(temp.getKey()+" "+temp.getValue());}Set<Integer> set=map.keySet();    Iterator<Integer> iter=set.iterator();    while(iter.hasNext()){    Integer temp=iter.next();    System.out.println(temp+" "+map.get(temp));    }