Monitor Java on Unix/Linux/Solaris

Just a short memo of useful commands that can help to troubleshoot Java on *nix:
(Btw, most of them will also work on Windows, but who runs Java on Windows? Just kidding...)

jps -m - show running Java processes and their pids.
jstack <pid> - print thread dump
jmap -dump:format=b,file=<path to file> <pid> - save heap dump to file