How to make a java jar file to be a single file executable?

Question

I have a jar file with a main class in it. The main class is already configured in the manifest file, meaning the jar can be executed in the following way:

java -jar Main.jar

I'd like to make it executable, meaning running it in the following way, without the need to provide any parameter. Windows:

Main.cmd

or Linux:

Main.sh

How can I package the jar into an executable?

Answer 1

For Linux, there's a way: Package the jar in a bash file. Steps:

1- Create a stub:

MYSELF=`which "$0" 2>/dev/null`
[ $? -gt 0 -a -f "$0" ] && MYSELF="./$0"
exec java -jar $MYSELF "$@"
exit $?

2- Concatenate the stub and the jar into a new executable:

cat stub.sh Main.jar > main.sh

3- Make the new file executable:

chmod +x main.sh

That's it! Source: https://coderwall.com/p/ssuaxa/how-to-make-a-jar-file-linux-executable