How to export a project to a JAR in Scala IDE for eclipse Correctly?

[罗辉]

Hi there:    

I export a project into jar like this "right click my project->choose export ->java-> jar file-> next->choose "src/main/resouces" and ''src/main/scala"'-> clikc browse and choose a jar file export location-> choose overwrite it",  and this jar is unable to run with "java -jar myjar.jar".  It says "no main manifest attribute, in /xxxx/MyJar.jar". It seems the file MANIFEST.MF lost the main class info when I export the jar.

I opened the MANIFEST.MF in my exported jar, and finds only below info:

Manifest-Version: 1.0

However I checked the MANIFEST.MF in my project, it is like this:

Manifest-Version: 1.0
Main-Class: org.abc.spark.streaming.Producer
Class-Path: lib/spark-core_2.10-1.6.1.jar ...........

I also tried to export my project as a runnable jar, but my class can not be run as a java application, the run button is not able to click.
So could anyone share a hand?
 

Thanks&Best regards!
San.Luo

[Simon Schäfer]

Exporting a Scala application as a runnable JAR is not supported. Use a build tool like sbt or maven instead to produce a runnable JAR.

---- On Thu, 28 Jul 2016 08:46:18 +0200 罗辉 <luohu...@gmail.com>wrote ----

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[hol...@informatik.htw-dresden.de]

You need to add  the Scala library to you project and provide a Scala wrapper for your project:

public class ScalaRunner {
    public static void main(String[] args) {
        Foo.main(args);
    }
}