java store objects that may be garbage collected

Question

In Java, I recall there is a way to store objects in a usable format that may be garbage collected. It is some sort of loose reference. If they get garbage collected there is a way to detect and reload.

I'm having a hard time finding this. There is so much information about GC in general. Anyone know the name?

Answer 1

我相信您正在寻找WeakReference

Answer 2

您正在考虑弱引用。

Answer 3

I think you're looking for the *Reference classes in java.lang.ref . The ReferenceQueue class allows you to be notified when a reference is collected.

You might also find FinalizableReference from Google Guava useful.