multithreading - What is the benefit of ThreadGroup in java over creating separate threads?

Question

Many methods like stop(), resume(), suspend() etc are deprecated.

So is it useful to create threads using ThreadGroup?

Answer 1

Using ThreadGroup can be a useful diagnostic technique in big application servers with thousands of threads. If your threads are logically grouped together, then when you get a stack trace you can see which group the offending thread was part of (e.g. "Tomcat threads", "MDB threads", "thread pool X", etc), which can be a big help in tracking down and fixing the problem.