NoClassDefFoundError when running exported JAR from Eclipse

Question

I've looked up how to export .jars in eclipse online for hours. I've tried all the tutorials and have not been able to open my game. I've used the command prompt with

java -jar <name>

and get an error that says

Exception in thread "main" java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException.

Here's how I export my .jar in eclipse:

right click on the project and click on "export..."
select "jar"
select src, lib and resource folders
select .classpath and .project
select only "Export generated class files and resources"
select destination
click next twice
select "Generate manifest file"
select the main class
click finish

Is the `lwjgl.jar` in your classpath or the class `org/lwjgl/LWJGLException` in your jar file? — Jens, Sep 25 '14 at 07:17
If it's runnable try `java.exe -jar .jar`. Last jar may be optional but it won't hurt. — ChiefTwoPencils, Sep 25 '14 at 07:19
@ChiefTwoPencils No. The error is that a required class file is not found. It has nothing to do with how the JAR is executed. — Duncan Jones, Sep 25 '14 at 07:20
I think this problem is because of not adding lwjgl.jar in your classpath. — Abhiroop Sarkar, Sep 25 '14 at 07:21
@user2981826 Does your application run when you execute it inside Eclipse? If you open the JAR file with Z-zip (or similar), can you find the LWJGLException class file? — Duncan Jones, Sep 25 '14 at 07:29
@user2981826 Is the class `org/lwjgl/LWJGLException` in your jar? — Jens, Sep 25 '14 at 07:29
Can you share with us your manifest and your project skeleton? The command **java -jar yourJar.jar** is not right, you have to suggest the path of your classpath — Skizzo, Sep 25 '14 at 07:32
@Jens org/lwjgl/LWJGLException is inside the lwjgl.jar which is inside of my jar, or does it have to be in the root folder or something? — user2981826, Sep 25 '14 at 07:33
Maybe you need to pack any external libraries in your Jar: http://stackoverflow.com/questions/7986063/generating-a-jar-in-eclipse-including-external-library — Daniel, Sep 25 '14 at 07:46

score 0 · Answer 1 · answered Sep 25 '14 at 07:37

0

Exporting it as jar will just package your project as an archive only. If you want to run it from the jar choose

Export>Runnable Jar File

Make sure you select your main class in the Launch Configuration.

answered Sep 25 '14 at 07:37

Indrajith

880
12
21

NoClassDefFoundError when running exported JAR from Eclipse

1 Answers1