How to create a scheduler task in Window Task Scheduler using Java?

Question

I want to create a task under Window Task Scheduler using my java code. OS I am using is win7 64bit. After creating the task I have to edit the scheduled time weekly or biwe

Answer 1

Windows have already a task scheduler that you can invoke from command line: Schtasks.exe

SCHTASKS /parameter [arguments]

Description: Enables an administrator to create, delete, query, change, run and end scheduled tasks on a local or remote system.

Parameter List: /Create Creates a new scheduled task.

/Delete Deletes the scheduled task(s).

/Query Displays all scheduled tasks.

/Change Changes the properties of scheduled task.

/Run Runs the scheduled task on demand.

/End Stops the currently running scheduled task.

/ShowSid Shows the security identifier corresponding to a scheduled t ask name.

/? Displays this help message.

Answer 2

Try this one http://yajsw.sourceforge.net/. Using "YAJSW" (Yet Another Java Service Wrapper) you can register your java service as a windows service.

Answer 3

Launch the command line utility schtasks.

To create the task.

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class TestWinScheduler {

public static void main(String args[]) throws IOException, InterruptedException {
  // schtasks /create /tn "HowToTask" /tr c:\temp\test.cmd /sc once /st 00:00:00 /sd 2022/01/01 /ru username /rp password

  List<String> commands = new ArrayList<String>();

  commands.add("schtasks.exe");
  commands.add("/CREATE");
  commands.add("/TN");
  commands.add("\"HowToTask\"");
  commands.add("/TR");
  commands.add("\"c:/temp/test.cmd\"");
  commands.add("/SC");
  commands.add("once");
  commands.add("/ST");
  commands.add("00:00:00");
  commands.add("/SD");
  commands.add("2022/10/10");
  commands.add("/RU");
  commands.add("username");
  commands.add("/RP");
  commands.add("password");

  ProcessBuilder builder = new ProcessBuilder(commands);
  Process p = builder.start();
  p.waitFor();
  System.out.println(p.exitValue()); // 0 : OK
                                     // 1 : Error
  }
}

To execute a task :

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class TestWinScheduler {

public static void main(String args[]) throws IOException, InterruptedException {
  // schtasks /run /tn "HowToTask"

  List<String> commands = new ArrayList<String>();

  commands.add("schtasks.exe");
  commands.add("/RUN");
  commands.add("/TN");
  commands.add("\"HowtoTask\"");

  ProcessBuilder builder = new ProcessBuilder(commands);
  Process p = builder.start();
  p.waitFor();
  System.out.println(p.exitValue()); // 0 : OK
                                     // 1 : Error
  }
}

Ref