Thread Pools 2 : Thread Pool « Threads « Java

Home
Java
1.2D Graphics GUI
2.3D
3.Advanced Graphics
4.Ant
5.Apache Common
6.Chart
7.Class
8.Collections Data Structure
9.Data Type
10.Database SQL JDBC
11.Design Pattern
12.Development Class
13.EJB3
14.Email
15.Event
16.File Input Output
17.Game
18.Generics
19.GWT
20.Hibernate
21.I18N
22.J2EE
23.J2ME
24.JavaFX
25.JDK 6
26.JDK 7
27.JNDI LDAP
28.JPA
29.JSP
30.JSTL
31.Language Basics
32.Network Protocol
33.PDF RTF
34.Reflection
35.Regular Expressions
36.Scripting
37.Security
38.Servlets
39.Spring
40.Swing Components
41.Swing JFC
42.SWT JFace Eclipse
43.Threads
44.Tiny Application
45.Velocity
46.Web Services SOA
47.XML
Java » Threads » Thread Pool 




Thread Pools 2
Thread Pools 2
    
/*
Java Threads, 3rd Edition
By Scott Oaks, Henry Wong
3rd Edition September 2004 
ISBN: 0-596-00782-5

*/
import java.util.concurrent.*;
import java.util.*;
import java.text.*;
import java.io.*;

public class SingleThreadTest {

  public static void main(String[] args) {
    int nTasks = 5;
    int fib = 4;
    SingleThreadAccess sta = new SingleThreadAccess();
    for (int i = 0; i < nTasks; i++)
      sta.invokeLater(new Task(fib, "Task " + i));
    sta.shutdown();
  }
}

class SingleThreadAccess {

  private ThreadPoolExecutor tpe;

  public SingleThreadAccess() {
        tpe = new ThreadPoolExecutor(
          1150000L, TimeUnit.SECONDS,
          new LinkedBlockingQueue<Runnable>());
    }  public void invokeLater(Runnable r) {
    tpe.execute(r);
  }

  public void invokeAneWait(Runnable rthrows InterruptedException,
      ExecutionException {
    FutureTask task = new FutureTask(r, null);
    tpe.execute(task);
    task.get();
  }

  public void shutdown() {
    tpe.shutdown();
  }
}

class Task implements Runnable {
  long n;

  String id;

  private long fib(long n) {
    if (n == 0)
      return 0L;
    if (n == 1)
      return 1L;
    return fib(n - 1+ fib(n - 2);
  }

  public Task(long n, String id) {
    this.n = n;
    this.id = id;
  }

  public void run() {
    Date d = new Date();
    DateFormat df = new SimpleDateFormat("HH:mm:ss:SSS");
    long startTime = System.currentTimeMillis();
    d.setTime(startTime);
    System.out.println("Starting task " + id + " at " + df.format(d));
    fib(n);
    long endTime = System.currentTimeMillis();
    d.setTime(endTime);
    System.out.println("Ending task " + id + " at " + df.format(d)
        " after " (endTime - startTime" milliseconds");
  }
}


           
         
    
    
    
  














Related examples in the same category
1.Defining a thread for a thread poolDefining a thread for a thread pool
2.Thread pool demo
3.Thread Pools 1
4.Thread pool
5.Thread Pool 2Thread Pool 2
6.Thread Pool TestThread Pool Test
7.JDK1.5 provides a mechanism to create a pool a scheduled task
8.Very basic implementation of a thread poolVery basic implementation of a thread pool
9.Thread Cache
10.Simple pool of ThreadsSimple pool of Threads
11.Worker thread pool
12.Create a new thread for the thread pool. The create thread will be a daemon thread.
13.Simple thread pool. A task is executed by obtaining a thread from the poolSimple thread pool. A task is executed by obtaining a thread from the pool
14.Simple object pool. Based on ThreadPool and few other classes
15.A utility class that receives a collection of tasks to execute internally and then distributes the tasks among a thread pool.
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.