Question

Is there a way to print out all the threads and its id, status using code?

For example, I have 5 threads, and I want to enumerate all of them.

Answer 1

You can do as below.

Set<Thread> threadSet = Thread.getAllStackTraces().keySet();

for (Thread thread: threadSet) {
 System.out.println(thread.getId());
}

Make sure you read and understand the method Thread.getAllStackTraces() before using them.