• 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

Synchronized - wait/notify/notifyall

 
Greenhorn
Posts: 22
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
wait() should be called from a synchronized method . RHE says the same is also true for the notify() method. But Bill Brogden in Exam Cram says that it is true ONLY for wait(). What about notifyall()?
 
Ranch Hand
Posts: 18944
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Bill Brogden writes in Exam Cram on page 177 that "...your calls to wait or notify or notifyAll should be in synchronized code blocks."
This is correct. Otherwise, an IllegalMonitorStateException could be thrown if a different thread (not the who made the wait() call) tries to notify() or notifyAll().
 
Greenhorn
Posts: 25
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I think wait() notify(), notifyAll() should be executed by synchronizing on same lock. The threads may be different, as a different thread will notify a waited thread.
 
This looks like a job for .... legal tender! It says so right in this tiny ad:
a bit of art, as a gift, that will fit in a stocking
https://gardener-gift.com
reply
    Bookmark Topic Watch Topic
  • New Topic