Hssf error

[S Shehab]

hi,
i'm getting this error although all the needed packages in the classpath

here is the error :

 Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/hssf/usermodel/HSSFWorkbook
        at sherif_DataToExcel.DataToExcel.<init>(DataToExcel.java:48)
        at sherif_Db.client_input.logic(client_input.java:58)
        at sherif_Db.client_input.main(client_input.java:25)
Caused by: java.lang.ClassNotFoundException: org.apache.poi.hssf.usermodel.HSSFWorkbook
        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)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)   

any recommendations?

[Jaikiran Pai]

How have you added the jars to the classpath? And what command do you use to run the program?

[S Shehab]

Originally posted by Jaikiran Pai:
How have you added the jars to the classpath? And what command do you use to run the program?

i made a sealed jar with the eclipse and run the jar with a batch inside it this command

 java -jar ncb_reports_v2.jar   

Sealing your java jar

any comments ?

[Ulf Dittmer]

So you extracted the POI classes, and then added them to that jar file?

[S Shehab]

Originally posted by Ulf Dittmer:
So you extracted the POI classes, and then added them to that jar file?

No i putted them as it (.jar)

[Ulf Dittmer]

You can't put a jar file inside of another jar file, and then expect the classloader to be able to load those classes. Either extract the classes from the POI jar files and add them to your application's jar file, or keep the jar files separate and add a manifest to the main jar file that points to the other ones.