//最常规的一种遍历方法,最常规就是最常用的,虽然不复杂,但很重要,这是我们最熟悉的,就不多说了!! public static void work(Mapmap) { Collection c = map.values(); Iterator it = c.iterator(); for (; it.hasNext();) { System.out.println(it.next()); } } //利用keyset进行遍历,它的优点在于可以根据你所想要的key值得到你想要的 values,更具灵活性!! public static void workByKeySet(Map map) { Set key = map.keySet(); for (Iterator it = key.iterator(); it.hasNext();) { String s = (String) it.next(); System.out.println(map.get(s)); } } //比较复杂的一种遍历在这里,呵呵~~他很暴力哦,它的灵活性太强了,想得到什么就能得到什么~~ public static void workByEntry(Map map) { Set > set = map.entrySet(); for (Iterator > it = set.iterator(); it.hasNext();) { Map.Entry entry = (Map.Entry ) it.next(); System.out.println(entry.getKey() + "--->" + entry.getValue()); } }}{ int size = map.size(); Set keysSet = map.keySet(); Iterator iterator = keysSet.iterator(); while(iterator.hasNext()) { Object key = iterator.next();//key Object value = map.get(key);//value }}