What really frustrates me about how (I assume Oracle) handled this transition away from java.net is that all the issue links just lead to the same "java.net is closed" page, they didn't bother to redirect them to the github issues pages (the issue IDs are the same from what I've seen).

I run into this issue often enough that I've been tempted to write a userscript to translate the java.net links automatically... doesn't do anything about all the broken documentation links though :(