Java Links

Question

Is there a way to find all references to an object (in Java)?

I have an object cache, and I would like to periodically check it to see if it will destroy it.

Answer 1

You can take a look at the different types of links that Java provides: strong, soft, weak, and phantom .

In the cache, you usually wrap the link in WeakReference or SoftReference and allow you to collect the object if no stronger links remain.

Answer 2

I have an object cache

Consider using WeakHashMapinstead HashMapto get all of them.

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