Solved

Threads in vector

Posted on 2002-05-20
4
282 Views
Last Modified: 2013-12-14
I have 3 classes.

//Task.class as follow
import java.util.*;
import java.io.*;
import java.text.*;

public class Task extends Thread {
     boolean live = true;
     long sleepInterval;
     int cc = 0;
     public static Task Instance;
     public Task() {
          Instance = this;
          sleepInterval = 5000;
          start();
     }
     
     public void run() {
     
          while (live) {
               try {
                    sleep(sleepInterval);
               } catch (Exception e) {
                    System.out.println("Interrupted sleep:loadsubmit " + e);
                    }
          }
     }

     public void setSleepInterval()
     {
          this.interrupt();
          sleepInterval = 10000;
     }

     public void printText() {
          System.out.println("thread is alive " + this.isAlive());
     }
}

//END

2. UpdateTask.class will extends Thread and call Task.Instance.setSleepInterval to update the sleepInterval for specific Task.
2. Main.class contain a vector to add a numbers of Task.class.
My answer is how can i refer UpdateTask to the specific Task.Instance because every Task.class has the same Instance name (Task).

Thanks alot.

0
Comment
Question by:chencc77
  • 2
4 Comments
 
LVL 9

Expert Comment

by:Venci75
ID: 7021320
...
private static Vector instances = new Vector();
public Task() {
  instances.addElement(this);
  sleepInterval = 5000;
  start();
}
public static Task getInstance(int i) {
  return (Task) instances.get(i);
}
...
   
now you can use :
Task.getInstance(2).setSleepInterval();
0
 

Author Comment

by:chencc77
ID: 7022851
Thanks Venci75, i am trying on it before close this question. Thanks again for ur help.
0
 
LVL 92

Accepted Solution

by:
objects earned 100 total points
ID: 7022972
The only reason to have a global reference to your Threads is if you require all classes to have access to them. If you only require access from UpdateTask then simply pass your vector of Task instances to the UpdateTask ctor.

Vector threadList = new Vector(100);
for (int i=0; i<100; i++)
{
 Thread t = new Thread1();
 threadList.add(t);
}

UpdateTask updater = new UpdateTask(threadList);
0
 
LVL 92

Expert Comment

by:objects
ID: 7074242
0

Featured Post

ScreenConnect 6.0 Free Trial

Explore all the enhancements in one game-changing release, ScreenConnect 6.0, based on partner feedback. New features include a redesigned UI, app configurations and chat acknowledgement to improve customer engagement!

Question has a verified solution.

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

Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.

770 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