Solved

Threads in vector

Posted on 2002-05-20
4
279 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

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
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 …
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …

746 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

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now