遍历Map的最佳方法

最新推荐文章于 2023-11-11 21:07:26 发布

原创最新推荐文章于 2023-11-11 21:07:26 发布 · 559 阅读

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#HashMap #遍历

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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
    }
}