Is there a map implementation for Java listeners?

I want a map implementation where I can add listeners for put () events

What is available in standards or any third-party library?

Solution

I don't know any standards or third parties, but it's easy to create a class that 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.

}