Solution Advice: Service

A service program runs in background continuously


If your java program performs a service, for example, listen on certain tcp port or do a background task, you can run your java program as a service.


To run as a service, your java program does not need any special coding, but just keep running by 'accept()' or 'sleep()' in your java program as normal. After the service program is installed, it can automatically start up when System starts up. Service program usually runs in background for a long time, you can redirect System.out and System.err to a disk file as a log file.

Features used

Following features are advised to use:

Feature Advice Introduction How to enable

Service application


To run as a background service, it is required to create a service type of application.

At Step 2, select Service application

Integrate develop


If you need to get the Event of stop service, you can call integrate API to set a listener.

Set a listener to integrate API

Minimum JRE


If you use a feature since certain version of JRE, you'd better set a min JRE version.

At Step 1, select a Min version



If you want to protect your program from being extracted and decompiled, you can select to encrypt it.

At Step 4, check the encrypt option

Event log


To record event to System event log, you can call the event log API.

At Step 4, check the event log

Force CWD

Enabled by default

Disk IO with 'relative path' are based from the "working directory". By default, the working directory of service program is set to the directory where the exe file is.

At Step 6 > Config Internal > Custom tab, use a 'forcecwd' item

Stdout redirect

Enabled by default

Because the console window is not visible, if you need to get the content of System.out, you can redirect it  to a disk file. By default, the System.err of service program is redirect to a disk file.

At Step 6 > Config Internal > Custom tab, use a 'stdout' item

Stdout redirect
to cronolog


You can redirect stdout to a pipe, "| cronolog.exe %Y%m%d.log", to split output to a daily log file.

Use a "stdout | cronolog.exe" in config

Program icon


Service type of application is started background, so a program icon is not necessary.

At Step 6 > Version & messages


Steps to create service program:

  1. The demo program is a simple ftp server. ( Source code)
  2. Compile and pack into a jar file: jftpsvr.jar
  3. Start Jar2Exe, at step 1, click Browse Jar and select 'jftpsvr.jar'
  4. At step 1, click the Min box and edit it to 1.4.2.
  5. At step 2, select Service application.
  6. At step 3, select the main class com.regexlab.ftp.FtpServer
  7. At step 3, input a NT service name: jftpsvr
  8. At step 4, check the Encrypt and hide class files option.
  9. At step 7(Finished), click Config External, then
    1. At Custom tab, append "stdout |cronolog.exe %Y%m%d.log" to redirect System.out to a daily log file.
    2. At Custom tab, append "stderr |cronolog.exe %Y%m%d.log" to redirect System.err to a daily log file.
    3. Click OK to close this popup dialog
  10. Download cronolog from , put the "cronolog.exe" along with jftpsvr.exe



Allow changing service name during installation

As far as I know service name for Windows service could be defined only during build process. We tremendously need to install the same executable as multiple services with different names. Is there any possibility to do this e.g. via command line parameter:
myservice.exe /install /service MyServiceName

thanks for response

Not provided by Jar2Exe

It is possible in technique, but Jar2Exe does not provide this feature. The service name is fixed when generating exe.

Application dosen't stand after program is over

Dear sir,

I have created a application on displaying tables of numbers but the application gets close as soon as tables are printed.

please help.

Thank you.

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