How to Execute a Command Line Java Application After Installation with Install4j

How can I execute a command line to run a Java application (using java -jar filename.jar) at the end of an installation in Install4j?

java -jar filename.jar

Executing a Java application as a command line task at the end of an installation using Install4j is a straightforward process. Install4j provides functionality to run external commands, including Java applications, post installation using the appropriate steps in your project settings.

java -jar /path/to/your/filename.jar

Causes

• Missing configuration of the post-installation action in Install4j.
• Incorrect file paths or execution permissions for the jar file.

Solutions

• Open your Install4j project and navigate to the 'Installer' section.
• Go to the 'Actions' tab and click on 'Add Action'.
• Select 'Run executable' from the list of actions.
• In the 'Executable' field, specify the path to the Java executable (for example, 'java').
• In the 'Arguments' field, enter the argument '-jar filename.jar', ensuring 'filename.jar' is the correct relative or absolute path to your jar file.
• Set the 'Working directory' to the location of your jar file.
• Make sure to place this action at the appropriate point in the installation flow, usually at the end, by dragging it into the correct position.

Mistake: Forgetting to set permissions for the jar file.

Solution: Ensure that the jar file has execution permissions set.

Mistake: Incorrect path specified for the Java executable or jar file.

Solution: Double-check the file paths and use absolute paths when necessary.

Mistake: Not testing the installer after configuration changes.

Solution: Always test the installer on a clean machine to verify that the command runs successfully at the end.