Map遍历的三种方式
//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(Map<String, Student> map) { Collection<Student> c = map.values(); Iterator it = c.iterator(); for (; it.hasNext();) { System.out.println(it.next()); } }
public static void workByKeySet(Map<String, Student> map) { Set<String> key = map.keySet(); for (Iterator it = key.iterator(); it.hasNext();) { String s = (String) it.next(); System.out.println(map.get(s)); } }
public static void workByEntry(Map<String, Student> map) { Set<Map.Entry<String, Student>> set = map.entrySet(); for (Iterator<Map.Entry<String, Student>> it = set.iterator(); it.hasNext();) { Map.Entry<String, Student> entry = (Map.Entry<String, Student>) it.next(); System.out.println(entry.getKey() + "--->" + entry.getValue()); } }}