ruby-on-rails – 遍歷HashMap[重複]

迭代 entrySet() ,如下所示:

 public static void printMap(Map mp) {
    Iterator it = mp.entrySet().iterator();
    while (it.hasNext()) {
        Map.Entry pair = (Map.Entry)it.next();
        System.out.println(pair.getKey() + " = " + pair.getValue());
        it.remove(); // avoids a ConcurrentModificationException
    }
}
 

閱讀更多關於 Map .