ClassNotFoundException when connecting to Mysql with JDBC
- by Jacob Lyles
I'm getting the following error when I try to run a simple Java JDBC program at the command line:
Exception in thread "main" java.lang.NoClassDefFoundError: LoadDriver/java
Caused by: java.lang.ClassNotFoundException: LoadDriver.java
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:315)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330)
at java.lang.ClassLoader.loadClass(ClassLoader.java:250)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:398)
Here's the simple Java program, copied right out of the JDBC docs:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
// Notice, do not import com.mysql.jdbc.*
// or you will have problems!
public class LoadDriver {
public static void main(String[] args) {
try {
// The newInstance() call is a work around for some
// broken Java implementations
Class.forName("com.mysql.jdbc.Driver").newInstance();
} catch (Exception ex) {
throw ex;
// handle the error
}
}
}
Problem is, I'm bloody sure my bash shell $ClASSPATH variable is pointed at the correct .jar file. To be sure, I copied the JDBC .jar to the same directory as my program and ran it as follows:
java -classpath ./mysql-connector-java-5.1.12-bin.jar LoadDriver.java
I still get the same error.
I'm running under Mac OSX, if it matters.
