Doubt on setDeamon().

[Xiao Song]

Code as follows:

   
   public class A extends Thread {
2. A() {
3. setDaemon(true);
4. }
5.
6. public void run() {
7. (new B()).start();
8. try {
9. Thread.sleep(60000);
10. } catch (InterruptedException x) {}
11. System.out.println(�A done�);
12. }
13.
14. class B extends Thread {
15. public void run() {
16. try {
17. Thread.sleep(60000);
18. } catch (InterruptedException x) {}
19. System.out.println(�B done�);
21. }
22. }
23.
24. public static void main(String[] args) {
25. (new A()).start();
26. }
27. }
 

Why there is no output? What does setDeamon() do?
Thanks advance!

[Bert Bates]

Well setDaemon isn't on the exam, so go to the next question, or see if you can refactor this code without setDaemon

[venkatesh pendharkar]

Daemmon threads are just service providers to other User threads.A daemon thread is stopped if there are no other user threads are running.When an application starts,a user thread is automatically executed to run the main() method & other threads are spawned from this main thread.
In your code the other thread that is created is a daemon thread & hence once the main thread finishes the execution ,program terminates.

[Abdul Rehman]

Originally posted by Bert Bates:
Well setDaemon isn't on the exam, so go to the next question, or see if you can refactor this code without setDaemon

I am always hungry for such posts...

[Xiao Song]

thanks all..