遍历Map的最佳方法

Vali Z

于 2015-10-20 15:02:33 发布

阅读量559

点赞数 1

CC 4.0 BY-SA版权

分类专栏： Java 文章标签： HashMap 遍历

本文链接：https://blog.youkuaiyun.com/zhoaya188/article/details/49277417

Java 专栏收录该内容

4 篇文章

订阅专栏

遍历Map的最佳方法

public static void printMap(Map<Object, Object> mp) {
    for (Map.Entry entry : mp.entrySet()) {
        System.out.println(entry.getKey() + " = " + entry.getValue());
    }
}

public static void printMap(Map mp) {
    Map<?, ?> contentsTyped = (Map<?, ?>) params;
    for (Map.Entry<?, ?> entry : contentsTyped.entrySet()) {
        System.out.println(String.valueOf(entry.getKey()) + " = " + String.valueOf(entry.getValue()));
    }
}

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
    }
}