Create runnable jar from command line

Question

In folder ~/code/ I have bin/ src/ lib/ A manifest.txt is created in ~/ with the content:

Main-class: test.MyMainClass
Class-Path: lib/*.jar

Then in ~ I used command

jar cfm d.jar manifest.txt code/

then I run

java -jar d.jar

it says

Exception in thread "main" java.lang.NoClassDefFoundError: test/MyMainClass Caused by: java.lang.ClassNotFoundException: test.MyMainClass

Answer 1

Why do you pack bin, src, and lib? You need to pack the compiled classes.

Ie first, compile your project. You'll get some classes dir. Go to that dir and pack those files with jar .

Then you need to have META-INF/MANIFEST.MF with the Main-class: ...

Check this nice article - last chapter. http://www.skylit.com/javamethods/faqs/createjar.html

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If this is the first time you play with Java, it's good to learn the basics - how the files in .jar are organized etc.

But later, to be efficient when building, I'd suggest you to use Maven. http://maven.apache.org/guides/getting-started/maven-in-five-minutes.html