It took about 2 hours tonight to read an official article about JVM and GC, and organize it into a mind map at the same time, as shown in the figure below.
For the detailed garbage collection process, from Eden to old generation, there is a very detailed introduction in the original text. We will take time to translate the original article in the future.
And the original of the mind map is also in the attachment, and you can download it if you are interested.
Reference article: http://www.oracle.com/webfolder/technetwork/tutorials/obe/java/gc01/index.html