Distinguishing between Java threads and OS threads?

Question

How do I distinguish running Java threads and native threads?

In Linux there will be Parent process for every child process, and they say 0 is the parent of all the

Answer 1

There is no generic solution how Java threads are mapped to OS threads, if at all. Every JVM implementation can do it in a different way.

There is also a pure Java thread implementation, called green threads. This is used as a fallback if native threads aren't supported or the system isn't multithreaded at all. You won't see any green threads at your OS.

Can a running Java threads can be suspended or killed from another Java code ?

If they are running at the same JVM, yes, with stop(). But that's not a good solution and may work, or not. interrupt() allows the thread so safely shut itself down.

There is no way to kill threads outside of the JVM I know of. If a OS really supports killing of threads, I wouldn't expect the Java application to run correctly afterwards!