Java Thread monitoring. How to find out non daemon live threads?

Take a thread dump in VisualVM. Daemon threads have the word 'daemon' next to the thread name.

"Default RequestProcessor" daemon prio=1 tid=101e58000 nid=0x124d86000 runnable [124d85000]

Run:

$ jstack PID | grep tid= | grep -v daemon

This will dump all the thread of a given Java PID, filter lines with thread names and filter out non-daemon ones.

Remove -v to print daemon threads only.