Create Jar file which references another jar

Question

I used Eclipse Europa to develop my code . I am able to execute my code using eclipse. However i would like export my code as jar .

I have 4 classes in my project. I have used default package. My Class references external jars .

I tried to export as jar using export jar option . I donot have runnable jar option .

When i try to execute the program in command line it says

java -jar rus.jar "F2ile.xls" "Links.txt"

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/ss/us
rmodel/RichTextString
        at ReadText.main(ReadText.java:29)
Caused by: java.lang.ClassNotFoundException: org.apache.poi.ss.usermodel.RichTe
tString
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 1 more

Consider reading [Adding Classes to your JAR's Class Path](https://docs.oracle.com/javase/tutorial/deployment/jar/downman.html) — Edwin Dalorzo, Dec 19 '14 at 16:56
I am building jar using Eclipse. Not sure how to specify classpath — user1710923, Dec 19 '14 at 17:09
[Eclipse Europa](https://www.eclipse.org/europa/) was released in 2007. [Eclipse Luna](https://www.eclipse.org/luna/) was released in 2014. — Basilevs, Dec 19 '14 at 17:27

nitishagar · Answer 1 · 2014-12-19T17:19:15.943

0

This is a classpath issue, you can try the following:

java -cp rus.jar:<poi-*.jar> <class> //poi jar name to provide and the class

Other option would be to use manifest file:

<jar jarfile="rus.jar">
    ..
    ..
    <manifest>
       <attribute name="Main-Class" value="<class_name>"/>
       <attribute name="Class-Path" value="<poi*.jar>"/>
    </manifest>
</jar>

edited Dec 19 '14 at 17:19

answered Dec 19 '14 at 17:03

nitishagar

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Olivier Meurice · Answer 2 · 2014-12-19T17:17:48.040

Package your jar with a MANIFEST file in the META-INF directory (at root level in the jar file). In the MANIFEST add an entry to specify the main class to execute:
Main-Class: classname
where classname is the full class name including the package. When packaged you can run the main class with the command java -jar jarfile.jar.
You do not have to specify the class name on the command line. Easier for anybody that could use your jar file.

Create Jar file which references another jar

2 Answers2