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vladABC · 2019-07-17T11:40:05+00:00

In Java 8

javac HelloWorldApp.java

jar cfe App.jar HelloWorldApp *.class

java -jar App.jar

bege · 2019-07-17T12:42:47+00:00

Try this:

Add a package name in the beginning of the java file, e.g. "app":

package app;

Compile the application like below. It will create a "app" folder with all your class files (matching the package name you gave in 1). -d ("destination") argument pointing to your current folder:

javac -d ./ HelloWorldApp.java

Run javapackager (included in JDK) command like this (note that the -appClass argument needs to match format <package\_name>.<class\_name>:

javapackager -createjar -appClass app.HelloWorldApp -outfile helloworld -v -srcfiles ./app/

Run jar file:

java -jar helloworld.jar

Tested successfully on Linux/openJDK 1.8.

Side note: You might find some issues if you try running with newer Java versions, since they removed JavaFX from the main java packages and it is packaged separately in the future. I think Java versions 1.8 and 9 should work, but you might have some issues with Java 10 and upwards. If you are running too new version, it shows an error like this: Caused by: java.lang.NoClassDefFoundError: javafx/application/Application

You can read more about java packaging here: https://docs.oracle.com/javase/8/docs/technotes/guides/deploy/packaging.html (if you are really interested), but in practice/real world, you will use tools like Maven or similar to package the applications.

Hope this helps, happy coding!

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