Win a copy of Testing JavaScript Applications this week in the HTML Pages with CSS and JavaScript forum!
  • 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 all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Bear Bibeault
  • Ron McLeod
  • Jeanne Boyarsky
  • Paul Clapham
Sheriffs:
  • Tim Cooke
  • Liutauras Vilda
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • fred rosenberger
  • salvin francis
Bartenders:
  • Piet Souris
  • Frits Walraven
  • Carey Brown

Printing numbers in sequence through threads.

 
Ranch Hand
Posts: 280
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi,

I have a question or rather an exercise.

You have two threads, one is printing odd numbers and one is printing even number continuously. Manage them in such a way that they print numbers in sequence.

I understand that this could be done in many ways for e.g. through Semaphore, explicit locks, etc.

I have prepared its solution through wait()/notify()/notifyAll() but its not working. Following is the code:

Assumptions:
1) I am limiting the numbers to 15.
2) Also I am storing the numbers in a List and printing it at the end.
3) I am taking counter as a shared variable.









I have broken my head on this code for several days but couldn't solve this . Please do help me and do let me know what's wrong in this code which I have written. I am having nightmares. Everyday I try to solve this problem and bang my head for several hours in this but to of avail and everyday I feel disappointed. This code would help me in clarifying my concept of wait()/notify()/notifyAll().

Thanks,
Sid.

 
Ranch Hand
Posts: 43
2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
This is because the variable "oddTurn" is an instance variable to both classes Even and Odd. As both the classes need to communicate with one another to know whose turn it is, there has to be something which is shared. i.e. changes in one class need to be visible to the other class.

    Bookmark Topic Watch Topic
  • New Topic