Comments on: JDBC ClassNotFoundException (NetBeans, Classpath, Java)

By: Marc

Marc — Fri, 18 Apr 2008 05:45:25 +0000

maaan maaan u’re the one amigo u’re the one
i was getting sooooo frustrated with it
thx a lot bro…………EUUUUURRREKAAAAAA!!!!!!!

By: D

Tue, 15 Apr 2008 02:39:01 +0000

Thanks a lot! I was searching for a way to add jar files to netbeans for more than two hours :-)

Regards,
D

By: James Bond

James Bond — Thu, 06 Mar 2008 22:59:32 +0000

THANK YOU SO MUCH. I too spent 2-3 hours on Google trying various options including:
- adding the JAR to Environment Variables
- adding it to the classpath in Netbeans under Options
- adding it to the jdk/lib/ext folder

Then I tried your suggestion by adding it to my project’s library too and it worked.

By: Babar Raheem

Babar Raheem — Thu, 28 Feb 2008 20:35:20 +0000

lol, Thank you Very much. just what i was looking for!

perfect!

By: Shweta

Shweta — Mon, 11 Feb 2008 15:07:55 +0000

I wish to include the package org.apache.http.* in my project but finding it difficult..

Even after finding the classpath and copying the HHTPclient in it I get a error that the package does not exist..

Can you please help me??

By: Robert

Robert — Wed, 30 Jan 2008 23:37:15 +0000

Thank you so much. I was pulling my hair out trying to figure out this error message. I’m using NetBeans6 and and JDK 6. For me I had a little different squence of events to do, but the basic theme was the same.

1. Right-click on your project.
2. Select “Properties.”
3. Click “Add Library…”
4. Choose “Java DB Driver”
5. Click “OK”.

Here’s a sample of the code I use to create the database from the Java book I’m reading.

public void createDatabase() {
// create the database
String data = “jdbc:derby:presidents;create=true”;
try {
// load the driver
Class.forName(”org.apache.derby.jdbc.EmbeddedDriver”);
// create the connection
Connection conn = DriverManager.getConnection(data);

By: Karl

Karl — Thu, 27 Dec 2007 18:00:56 +0000

K I much appreciate this post, it helped but not immediatly. I have 6.0 and 5.5.1 Netbeans installed. The derby seems to have been installed with 5.5.1 and I expected 6.0 to install a new Jar. However I could only find the old one under a slightly unexpected path of: C:\Documents and Settings\jkl\.netbeans\5.5.1\db-derby-10.1.3.1-bin\lib\derbyclient.jar . I expected to find it in the Netbeans fold. Anyways once adding this jar to my libraries the exception was no longer thrown and the driver loaded successfully. Awesome stuff.

Thanks

By: Andrea

Andrea — Thu, 18 Oct 2007 08:08:04 +0000

Hey this (adding derby.jar etc) worked but when I tried it on command prompt it still gave me errors. I’ve been through all the tutorials they got me even more confused.

My homework involves using Java DB & RMI
To run I typed this:

C:\Documents and Settings\andy\Desktop\uni stuff\cmp416\A3\sqlsample\build\classes> rmic ServiceProvider

(works without errors)

C:\Documents and Settings\andy\Desktop\uni stuff\cmp416\A3\sqlsample\build\classes> start rmiregistry

(works without errors)

C:\Documents and Settings\andy\Desktop\uni stuff\cmp416\A3\sqlsample\build\classes> start java StudServer

(starts server without errors but then gives this database error :

cannot connect to database

java.lang.ClassNotFoundException: org.apache.derby.jdbc.ClientDriver )

By: bertport

bertport — Sat, 13 Oct 2007 23:12:32 +0000

This helped me, but I also had to try out adding a few different derby jar files to my project library, and I had to try out a couple variations of jdbc url.

I created a database (COFFEEBREAK in Sun’s JDBC Tutorial) using Tools -> java DB database -> create Java DB database in the Netbeans menu, and then I wanted to reach that database from a java class, running from the IDE as usual. I wound up adding three jar files to my project libraries - ~\.netbeans\5.5.1\jdbc-drivers\derbyclient.jar, C:\Sun\SDK\javadb\lib\derby.jar, and C:\Sun\SDK\javadb\lib\derbytools.jar. (I’m not sure I needed all of these, but definitely the first of the three did not do it for me).

I experimented with jdbc.derby://localhost:1527/COFFEEBREAK vs. jdbc:derby:COFFEEBREAK (I needed the localhost:1527), and I experimented with org.apache.derby.jdbc.EmbeddedDriver vs. org.apache.derby.jdbc.ClientDriver. (I needed the ClientDriver, not the EmbeddedDriver.)

By: Etienne

Etienne — Fri, 28 Sep 2007 16:21:37 +0000

Thank you, you solved my problem. I came upon your page through a Google hit. I had tried looking through the project’s properties but as luck would have it, the dialog has no maximise button and the button to add jar/folder was not visible without increasing the dialog’s size.

Cheers

By: adrian

adrian — Fri, 14 Sep 2007 15:23:21 +0000

I’ve just spent 2 and a half days trying to figure this one out. A lifesaver !! I was so close to trashing my computer!

By: Therese albert

Therese albert — Wed, 05 Sep 2007 00:52:34 +0000

‘’java.lang.ClassNotFoundException’ error
thanks a lot man..i was breaking my head for so long…thanks a lot again..it helped me a lot…

By: Halfdeck

Halfdeck — Wed, 01 Aug 2007 01:39:20 +0000

Hey Rajeev,

I’m glad you found the info useful.

By: Rajeev

Rajeev — Tue, 31 Jul 2007 15:36:07 +0000

Thanks a lot. I was Scratching head for one hour about the ”java.lang.ClassNotFoundException’ error. Your article is very good one & provides one step solution.

Please put other similiar errors also, which will help the beginners/ practitioners very much.
Thanks Again