是否有一个带有Java侦听器的Map实现？ [英] Is there a Map implementation with listeners for Java?

问题描述

我想要一个Map实现，我可以在其中添加put（）事件的监听器。

I would like a Map implementation in which i could add listeners for put() events.

标准或任何第三方库中是否有类似内容？

Is there anything like that in the standard or any 3rd party libraries?

推荐答案

我不知道任何标准或第三方，但它很容易，只需创建一个包装另一个Map的类并实现Map接口：

I'm not aware of any standard or 3rd party, but it is easy, just create a class which wraps another Map and implements the Map interface:

public class MapListener<K, V> implements Map<K, V> {

    private final Map<K, V> delegatee;

    public MapListener(Map<K, V> delegatee) {
        this.delegatee = delegatee;
    }

    // implement all Map methods, with callbacks you need.

}

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