java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

Question

I am getting this error when compiling my java program

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

Then I knew that I should add the path of mysql-connector-java-3.1.14-bin.jar to the java classpath. I am using Windows XP, I edited the classpath in the controlpanel/system/enviromental variables

the classpath was : .;C:\j2sdk1.4.2_16\jre\lib;

so now it became : .;C:\j2sdk1.4.2_16\jre\lib;C:\Program Files\mysql-connector-java-3.1.144

however, i still get the same error, moreover, when I type set classpath in the cmd ( just to check what is the current classpath ) i get :

CLASSPATH= .;C:\j2sdk1.4.2_16\jre\lib;

can anyone help me fix this ?

Solution 1

You have to put the full path to the jarfile in the classpath (including the filename):

.;C:\j2sdk1.4.2_16\jre\lib;
C:\Program Files\mysql-connector-java-3.1.144\mysql-connector-java-3.1.14-bin.jar

As Hippo said, you have to restart cmd after changing that. If it doesn't work, launch your program like this:

java -cp ".;C:\j2sdk1.4.2_16\jre\lib;
C:\Program Files\mysql-connector-java-3.1.144\mysql-connector-java-3.1.14-bin.jar"
my.class.Name

Solution 2

1. Open Netbeans IDE
2. Right-click your Project.
3. Select Properties.
4. On the left-hand side click Libraries.
5. Under "Compile" tab - click Add Jar/Folder button.
6. Select Downloaded "mysql-connector-java-5.1.25-bin.jar" file (Download Connector/J from dev.mysql.com)
7. Click OK
8. Run Again... Its work.

Thanks...