How to convert a .java or a .jar file into a Linux executable file ( without a .jar extension, which means it's not a .jar file )

Question

I have been searching for many similar posts about this but I still can\'t find my answer. I want to convert a .java program into a Linux executable file, without the .jar e

Answer 1

Another simple trick to convert a jar to a Linux executable is just putting a shebang before the jar file.

Say we have a hello.jar file.

$ java -jar hello.jar
hello world!

You can create an executable in following steps.

$ echo "#! /usr/bin/env java -jar" > hello
$ cat hello.jar >> hello
$ chmod +x hello

Then, you will be able to execute the hello file directly.

$ ./hello
hello world!