Solved

java programming in Thread

Posted on 2004-10-03
4
211 Views
Last Modified: 2010-03-31
public class mythread extends Thread
{
      private boolean continuerun;
      public void setcontinuerun(boolean setc)
   {
         continuerun=setc;
   }
      public void run()
      {
            continuerun=true;
            while(continuerun)
            {
                  System.out.println("Iam running");
         }
                  System.out.println("Iam tired of running");
}
      public static void main(String args[])
      {
            mythread mm=new mythread();
            mm.start();
            //try
            //{
            //      Thread.currentThread().sleep(1000);
            //}
            //catch(InterruptedException ie)
            //{
      //}
            mm.setcontinuerun(false);
}
      }
My question is when is only when i add the sleep() method i could see the statement "Iam tired of running" ,why?
0
Comment
Question by:sraveend
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 5

Assisted Solution

by:TrekkyLeaper
TrekkyLeaper earned 250 total points
ID: 12213151
The call to setcontinuerun(false) was coming too soon. I am guessing, you were seeing an infinite loop of "Iam running". When you call start(), it does not switch context to that thread immediately. When you called sleep(), the context had a chance to change to the "mm" thread.

To restate, without the sleep, you were setting continuerun to false before you had even set it to true and gotten into the loop. With the sleep, you get into the loop before you change the boolean variable.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12213172
Possibly starvation of the explicitly created thread. Try

mm.setPriority(10);
0
 

Author Comment

by:sraveend
ID: 12213216
Could u suggest me any usefull link related to thread and synchronization
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 250 total points
ID: 12213227
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Ready to improve network connectivity? Watch this webinar to learn how SD-WANs and a one-click instant connect tool can boost provisions, deployment, and management of your cloud connection.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.
Suggested Courses

621 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question