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java.lang.ClassNotFoundException

Posted on 2002-04-12
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Last Modified: 2010-08-05
I am writing a utility for testing DAO classes. called StoredProcTest, in which I wanted to create a connection. I am getting this error, even I am setting the classpath like this,

Classpath settings are,

set CLASSPATH=.;D:\bea\wlserver6.0sp1\lib\weblogic_sp.jar;.D:\bea\wlserver6.0sp1\lib\weblogic-connenv-patch.jar;.D:\bea\wlserver6.0sp1\lib\weblogic.jar;.D:\bea\wlserver6.0sp1\config\mydomain\serverclasses;.D:\bea\wlserver6.0sp1\config\mydomain\lib\log4j.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\jconn2.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\xerces.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\romatcher.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\dummy.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\crypto.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\iaik_jce_full.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\dataconfig.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\chart.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\CWrapper.jar;.D:\bea\wlserver6.0sp1\config\mydomain\lib\messaging.jar


The error after running is like this,

D:\VirendraJava>java StoredProcTest
java.lang.ClassNotFoundException: com.sybase.jdbc2.jdbc.SybDriver
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:191)
        at java.lang.ClassLoader.loadClass(Compiled Code)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:275)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:237)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:124)
        at StoredProcTest.main(Compiled Code)
Hello World!

D:\VirendraJava>
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Question by:virendra032700
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10 Comments
 
LVL 18

Expert Comment

by:bobbit31
ID: 6936847
which jar file is com.sybase.jdbc2.jdbc.SybDriver in?
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Expert Comment

by:bobbit31
ID: 6936866
you could also try:

java -cp %CLASSPATH% StoredProcTest
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Author Comment

by:virendra032700
ID: 6936886
I tried like that, but same error.

Interesting thing is the last System.out.println("Hello World"); is printed as a last statement in exception.
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Author Comment

by:virendra032700
ID: 6936961
com.sybase.jdbc2.jdbc.SybDriver class is in jconn2.jar.

Could u pl just write the classpath setting only for thius jar.
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Expert Comment

by:bobbit31
ID: 6936976
what does this do:

java -cp D:\bea\wlserver6.0sp1config\mydomain\lib\jconn2.jar StoredProcTest
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Author Comment

by:virendra032700
ID: 6936999
This is the error I got,

D:\VirendraJava>java -cp D:\destinydocs\jconn2.jar StoredProcTest
Exception in thread "main" java.lang.NoClassDefFoundError: StoredProcTest

D:\VirendraJava>
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Accepted Solution

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bobbit31 earned 100 total points
ID: 6937024
ok, try this:

java -cp .\;D:\destinydocs\jconn2.jar StoredProcTest
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Author Comment

by:virendra032700
ID: 6937031
Thank you very much, for your help. Could you just elaborate why .\;d:\ was required.
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Expert Comment

by:bobbit31
ID: 6937042
.\ is the current directory (where StoredProcTest is)

did it work?

if so, then something is wrong w/ your classpath in your autoexec.bat (though if that's so, i don't see how you got your code compiled)

also, i noticed that in your classpath you have '.' before most of your paths (ie: .D:\bea\wlserver6.0sp1config\mydomain\lib\jconn2.jar

remove them.
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Author Comment

by:virendra032700
ID: 6937060
It does work, also I think classpath settings could be wrong.
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