获得Map的值的方法
public class Test { public static void main(String args[]) { // Map<String, String> emailsHashtable = new Hashtable<String, String>(); Map<String, String> emails = new HashMap<String, String>(); // 方法一: 用entrySet() Iterator<Map.Entry<String, String>> its = emails.entrySet().iterator(); while (its.hasNext()) { Map.Entry<String, String> m = (Map.Entry<String, String>) its.next(); System.out.println("email-" + m.getKey() + ":" + m.getValue()); } // 方法二： 用entrySet(),直接循环中 for (Map.Entry<String, String> m : emails.entrySet()) { System.out.println("email-" + m.getKey() + ":" + m.getValue()); } // 方法三：用keySet() Iterator<String> it = emails.keySet().iterator(); while (it.hasNext()) { String key; key = (String) it.next(); System.out.println("email-" + key + ":" + emails.get(key)); } // 方法四：change the values of map to collection,and use the Collection.iterator() method. /* * Map aa = new Hashtable(); for (Iterator i = aa.values().iterator(); i.hasNext();) { Object temp = i.next(); } */ Map aa = new HashMap(); for (Iterator i = aa.values().iterator(); i.hasNext();) { Object temp = i.next(); } }}?