Listing All Running Threads in a group

 


public class Main {
  public static void main(String[] argv) throws Exception {
    ThreadGroup group = Thread.currentThread().getThreadGroup().getParent();
    while (group.getParent() != null) {
      group = group.getParent();
    }
    int numThreads = group.activeCount();
    Thread[] threads = new Thread[numThreads * 2];
    numThreads = group.enumerate(threads, false);

    for (int i = 0; i < numThreads; i++) {
      Thread thread = threads[i];
      System.out.println(thread.getName());
    }

    int numGroups = group.activeGroupCount();
    ThreadGroup[] groups = new ThreadGroup[numGroups * 2];
    numGroups = group.enumerate(groups, false);

    for (int i = 0; i < numGroups; i++) {
      System.out.println(groups[i]);
    }
  }
}

1.	Create a thread by implementing Runnable.
2.	Create a thread by extending Thread.
3.	Thread Reminder
4.	Thread Race Demo
5.	Suggesting when to switch threads with yield()
6.	Creating threads with inner classes
7.	The safe way to stop a thread
8.	Calling sleep() to wait for a while
9.	Understanding join()
10.	Daemon threads spawn other daemon threads
11.	Daemon threads don't prevent the program from ending.
12.	Shows the use of thread priorities.
13.	Java new feature: threading
14.	Java 1.5 (5.0) new feature: Thread Schedule
15.	Two simple threads
16.	Simple threads creator
17.	Task
18.	SimpleThread using the Runnable interface.
19.	Very simple Threading example.
20.	Test Override Thread
21.	Test Override
22.	Parallelizing Loops for Multiprocessor Machines
23.	Setting priorities on the Thread objects
24.	Thread priorities.
25.	Use a ThreadGroup.
26.	Three Threads Test

Listing All Running Threads in a group : Simple Threads « Threads « Java

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