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java - 避免回调中的内存泄漏?

转载 作者:塔克拉玛干 更新时间:2023-11-03 04:28:38 27 4
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Possible Duplicate:
How to avoid memory leaks in callback?

Effective Java 说:

A third common source of memory leaks is listeners and other callbacks. If you implement an API where clients register callbacks but don’t deregister them explicitly, they will accumulate unless you take some action. The best way to ensure that callbacks are garbage collected promptly is to store only weak references to them, for instance, by storing them only as keys in a WeakHashMap.

我无法理解这一点。有人可以解释一下吗?

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