Schedular Task :
For this functionality,
You should create a class extending TimerTask(available in java.util package). TimerTask is a abstract class.
Write your code in public void run() method that you want to execute periodically.
Insert below code in your Main class.
import java.util.TimerTask;
import java.util.Date;
/**
*
* @author Dhinakaran P.
*/
// Create a class extends with TimerTask
public class ScheduledTask extends TimerTask {
Date now; // to display current time
// Add your task here
public void run() {
now = new Date(); // initialize date
System.out.println("Time is :" + now); // Display current time
}
}
Run Scheduler Task :
A class to run above scheduler task.
Instantiate Timer Object Timer time = new Timer();
Instantiate Scheduled Task class Object ScheduledTask st = new ScheduledTask();
Assign scheduled task through Timer.shedule() method.
import java.util.Timer;
/**
*
* @author Dhinakaran P.
*/
//Main class
public class SchedulerMain {
public static void main(String args[]) throws InterruptedException {
Timer time = new Timer(); // Instantiate Timer Object
ScheduledTask st = new ScheduledTask(); // Instantiate SheduledTask class
time.schedule(st, 0, 1000); // Create Repetitively task for every 1 secs
//for demo only.
for (int i = 0; i <= 5; i++) {
System.out.println("Execution in Main Thread...." + i);
Thread.sleep(2000);
if (i == 5) {
System.out.println("Application Terminates");
System.exit(0);
}
}
}
}
Output:
Execution in Main Thread....0
Time is :Tue Jun 19 14:21:42 IST 2012
Time is :Tue Jun 19 14:21:43 IST 2012
Execution in Main Thread....1
Time is :Tue Jun 19 14:21:44 IST 2012
Time is :Tue Jun 19 14:21:45 IST 2012
Execution in Main Thread....2
Time is :Tue Jun 19 14:21:46 IST 2012
Time is :Tue Jun 19 14:21:47 IST 2012
Execution in Main Thread....3
Time is :Tue Jun 19 14:21:48 IST 2012
Time is :Tue Jun 19 14:21:49 IST 2012
Execution in Main Thread....4
Time is :Tue Jun 19 14:21:50 IST 2012
Time is :Tue Jun 19 14:21:51 IST 2012
Application Terminates
Time is :Tue Jun 19 14:21:52 IST 2012
For this functionality,
You should create a class extending TimerTask(available in java.util package). TimerTask is a abstract class.
Write your code in public void run() method that you want to execute periodically.
Insert below code in your Main class.
import java.util.TimerTask;
import java.util.Date;
/**
*
* @author Dhinakaran P.
*/
// Create a class extends with TimerTask
public class ScheduledTask extends TimerTask {
Date now; // to display current time
// Add your task here
public void run() {
now = new Date(); // initialize date
System.out.println("Time is :" + now); // Display current time
}
}
Run Scheduler Task :
A class to run above scheduler task.
Instantiate Timer Object Timer time = new Timer();
Instantiate Scheduled Task class Object ScheduledTask st = new ScheduledTask();
Assign scheduled task through Timer.shedule() method.
import java.util.Timer;
/**
*
* @author Dhinakaran P.
*/
//Main class
public class SchedulerMain {
public static void main(String args[]) throws InterruptedException {
Timer time = new Timer(); // Instantiate Timer Object
ScheduledTask st = new ScheduledTask(); // Instantiate SheduledTask class
time.schedule(st, 0, 1000); // Create Repetitively task for every 1 secs
//for demo only.
for (int i = 0; i <= 5; i++) {
System.out.println("Execution in Main Thread...." + i);
Thread.sleep(2000);
if (i == 5) {
System.out.println("Application Terminates");
System.exit(0);
}
}
}
}
Output:
Execution in Main Thread....0
Time is :Tue Jun 19 14:21:42 IST 2012
Time is :Tue Jun 19 14:21:43 IST 2012
Execution in Main Thread....1
Time is :Tue Jun 19 14:21:44 IST 2012
Time is :Tue Jun 19 14:21:45 IST 2012
Execution in Main Thread....2
Time is :Tue Jun 19 14:21:46 IST 2012
Time is :Tue Jun 19 14:21:47 IST 2012
Execution in Main Thread....3
Time is :Tue Jun 19 14:21:48 IST 2012
Time is :Tue Jun 19 14:21:49 IST 2012
Execution in Main Thread....4
Time is :Tue Jun 19 14:21:50 IST 2012
Time is :Tue Jun 19 14:21:51 IST 2012
Application Terminates
Time is :Tue Jun 19 14:21:52 IST 2012
