Comments on: Java: Exception in thread main java.lang.NoClassDefFoundError

By: irfansiddique

irfansiddique — Wed, 18 Nov 2009 03:40:27 +0000

yes.. a dot .. it means, that it will search for classes bytecode in the current directory !

you can also tell java to search the current directory with the -classpath parameter

> java -classpath . Hello

Problems like this can really discourage java newbies, and that moment was very embarassing :)

By: neusbloed

neusbloed — Mon, 16 Nov 2009 08:11:13 +0000

Crimson you finally made me understand why I was doing it not properly. I use Eclipse too. I'm going to feel really dumb now but I'm really happy I can run my files.

By: Alan

Alan — Fri, 13 Nov 2009 11:30:49 +0000

I just started learning java using the Eclipse IDE. My java for idiots book (ok for dummies) gave me some code that uses swing to produce a message box. There are 2 classes (the book is demonstrating objects).
It ran fine from within eclipse, but if I tried running it from a command line it wouldn't work. I got the java.lang.NoClassDefFoundError.
I've searched the net and tried the -classpath . approach and still had no joy.
I then found a post here
http://bytes.com/topic/java/answers/15627-java-...
which refers to the package name as being an issue. I tried following the instructions but still had the issue. Eventually I removed the package definition from both my source files, recompiled and it runs fine. No classpath definition needed.

Cheers
Alan
W00t !

By: puneeth_n

puneeth_n — Fri, 06 Nov 2009 04:14:43 +0000

thanks a lot it was really heplful..

By: Bancio

Bancio — Wed, 04 Nov 2009 02:27:44 +0000

Thanks … this works for me… I have been seem this type before but I was typeing '.' close to '-classpath' …

By: Chip41092

Chip41092 — Wed, 28 Oct 2009 10:11:26 +0000

Ya, I've read all of these comments and have no clue where to type the java -classpath . XYZ

By: Thunder9751

Thunder9751 — Tue, 27 Oct 2009 03:40:06 +0000

how do you execute it with THAT command? like what do you do? where do you type that in (java -classpath)?

By: 007varun

007varun — Wed, 14 Oct 2009 07:29:02 +0000

is it a problem of program?.

By: Kevin

Kevin — Sun, 27 Sep 2009 17:20:11 +0000

I had this issue on linux. Turned out it was simply that the path had a space in it. When this was changed it worked fine.

By: shobana

shobana — Tue, 22 Sep 2009 10:26:37 +0000

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/xml/serializer/TreeWalker
at org.apache.xalan.processor.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:823)
at com.pg.EDICustomize.EDISplit204.generateTarget(EDISplit204.java:353)
at com.pg.EDICustomize.EDISplit204.execute(EDISplit204.java:99)
at com.pg.EDICustomize.EDISplit204.main(EDISplit204.java:392)
Caused by: java.lang.ClassNotFoundException: org.apache.xml.serializer.TreeWalker
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 4 more
Java Result: 1
BUILD SUCCESSFUL (total time: 2 seconds)

i got this error please help me to resolve this