• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

IllegalThreadStateException

 
Ranch Hand
Posts: 131
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator


Code is fine, compiles and runs too.

My question:-
"You can call start() on a Thread object only once. If start() is called
more than once on a Thread object, it will throw a RuntimeException."
[IllegalThreadStateException]

so why doesn't this 'llegalThreadStateException' happen here in this code ?

Thx.
 
Ranch Hand
Posts: 7729
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Let me ask you a question: how many thread objects have you got in your example?
 
Netty poestel
Ranch Hand
Posts: 131
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
afaiks:-

Thread # 1 = public static void main(String[] args)

Thread # 2 = new Thread(tc).start();

these 2 are for sure...now I'm confused on the last "new Thread(tc).start();"

would it mean there are 3 or 2 now.
 
Barry Gaunt
Ranch Hand
Posts: 7729
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Yes that last new Thread(tc).start(); is starting a third thread, it is not starting the other thread a second time.
 
Netty poestel
Ranch Hand
Posts: 131
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
all right here.
I was having the doubts after answering a question with the following code:

1. class MyThread extends Thread {
2.
3. public static void main(String [] args) {
4. MyThread t = new MyThread();
5. t.start();
6. System.out.print("one. ");
7. t.start();
8. System.out.print("two. ");
9. }
10.
11. public void run() {
12. System.out.print("Thread ");
13. }
14. }

now I am seeing the difference between this code and the one I started this thread with.
Thanks !
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
reply
    Bookmark Topic Watch Topic
  • New Topic