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This article will explain in detail how the GC judgment algorithm in JVM is, and the content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

JVM:GC judgment algorithm

Complete video tutorial

Garbage collector:

What kind of objects can be GC?

Judgment algorithm:

Reference counting method: when B is referenced in An object, B is counted once, as long as the count of B is not equal to 0, then B cannot be recycled, otherwise it can be recycled.

Accessibility analysis

Starting from GCroot, if you can reach An and B again, it means that both An and B are reachable and cannot be garbage collected.

Can be used as an object of GCroot: itself cannot be GC.

1. Objects referenced in the local variable table in the virtual machine stack.

2. Objects referenced by constants and static variables in the method area.

3. Objects referenced by JNI in the local method stack.

Will it be recycled if it is unreachable?

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