Scheduler and Job

Question

Hi,
I faced a problem when creating a Scheduler utility has following features:
- do jobs in the body of thread (run() method)
- run daily, during time (for example: run from 1hAM -> 5hAM everyday)
Here are 3 classes i wrote, could someone help me, please. Many Tknsk
public class Job extends Thread{
boolean run = false;
protected void startJob(){
this.run = true;
this.start();
protected void stopJob(){
run = false;
package icom.in.utils;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
public class Scheduler {
     private Timer timer;
     private long repeat = 0;
     private long during_time = 0;
     private Date start_time = null;
     private Job jobs[];
     private long curr = 0;
     private Watcher watcher;
     public Scheduler(Job[] $jobs, Date start_time, long repeat, long during){
          this.jobs = $jobs;
          this.repeat = repeat;
          this.during_time = during;
          this.start_time = start_time;
          timer = new Timer();
          watcher = new Watcher();
          watcher.setDaemon(true);
          System.out.println("New instant created!");
     public void start(){
          timer.schedule(new ATask(),start_time, repeat);
     class ATask extends TimerTask{
          public void run(){
               curr = System.currentTimeMillis();
               System.out.println("RESTART THE THREAD!");
               if(jobs != null){
                    for(int i = 0; i< jobs.length; i++){
                         if(!jobs.run){
                              jobs[i].startJob();
                    if(watcher.isAlive()){}
                    else{
                         watcher.start();
                    synchronized (watcher) {
                         watcher.notify();
     class Watcher extends Thread{
          public void run(){
               while(true){
                    try {
                         Thread.sleep(1*1000);
                    } catch (InterruptedException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
                    long curr2 = System.currentTimeMillis();
                    long spend = curr2 - curr;
                    if(spend >= during_time){
                         for(int i = 0; i< jobs.length; i++){
                              jobs[i].stopJob();
                              System.out.println("Interrupted!");
                         synchronized(this){
                              try {
                                   wait();
                              } catch (InterruptedException e) {
                                   // TODO Auto-generated catch block
                                   e.printStackTrace();
     public static void main(String[] args) throws Exception{
          ThreadForTesting[] jobs = new ThreadForTesting[3];
          for(int i = 0; i < jobs.length; i++){
               jobs[i] = new ThreadForTesting();
               jobs[i].setName("Thread-"+i);
          Scheduler scheduler = new Scheduler(jobs, new Date(), 15*1000, 3*1000);
          scheduler.start();
          for(int i = 0; i < jobs.length; i++){
               System.out.println("State: " + jobs[i].isInterrupted()+", alive: " + jobs[i].isAlive());
          Thread.sleep(10000);
          for(int i = 0; i < jobs.length; i++){
               System.out.println("--State: " + jobs[i].isInterrupted()+", alive: " + jobs[i].isAlive());
package icom.in.utils;
public class ThreadForTesting extends Job{
     static int i = 0;
     public void run(){
          while(run){
               System.out.println("Thread:"+this.getName());
               try {
                    Thread.sleep(1*1000);
               } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    //e.printStackTrace();
     public void stopJob(){
          run = false;
          this.interrupt();
}Brgds,
Chu Tuan Luyen
Edited by: ChuTuanLuyen on Oct 8, 2010 4:26 AM
Edited by: Quanduirach on Oct 11, 2010 12:39 AM

Answer 1

I think you can use Timer and TimerTask, google it. It's something like this
new Timer().schedule(new TimerTask() {
public void run() {
//your repeatable action, you can use Calendar to check whether it's the required hour
Calendar cal = new GregorianCalendar();
if(cal.get(Calendar.HOUR_OF_DAY) == 5){
//TODO
}, 0, interval); //interval can set to an hour, i.e.3600000