Q:

yet another java newbie error for "java.lang.ClassNotFoundException"

I'm new to java and trying to write a simple program using JDBC. It must be something obvious but I just don't see it. I've been defining the class path manually because the only two classes (at least that I think the program needs when it runs is sitting within the same directory as the program, that is, files for ojdbc_g.jar and JDBCexample.class). 
The program compiles fine using:
javac -cp ./ojdbc_g.jar JDBCexample.java

As you can tell, Oracle's JDBC driver (ojdbc_g.jar) is located in the same directory as file: JDBCexample.java. After compiling, I now also have file JDBCexample.class in this same directory. When I try to run it using:
java -classpath "*" JDBCexample    or,
java -classpath ./ojdbc6_g.jar:./JDBCexample.class JDBCexample  or,
java -classpath "*":ojdbc6_g.jar JDBCexample

I get the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: JDBCexample
Caused by: java.lang.ClassNotFoundException: JDBCexample
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: JDBCexample.  Program will exit.

Here's the file: JDBCexample.java:
import java.sql.*;
import oracle.jdbc.*;
import oracle.jdbc.pool.OracleDataSource;

class JDBCexample {

    public static void main(String args[]) throws SQLException {
            Connection conn;
            Statement stmt;
            String query;
            String sqlString;
            ResultSet rset;

            // connect to database
            OracleDataSource ds = new OracleDataSource();
            ds.setURL("jdbc:oracle:thin:@host6.mydomain.com:1521:ORCL");
            conn = ds.getConnection(HR,HR);

            // create Oracle DatabaseMetaData object
            DatabaseMetaData meta = conn.getMetaData();
            // show JDBC driver version
            System.out.println("JDBC driver version is " + meta.getDriverVersion());
    }

A:

You're compiling the class to the local directory. So when you run it, you need to include the current directory in your classpath.
If on linux machine
java -cp .:./ojdbc6_g.jar JDBCexample

if on Windows machine
java -cp .;./ojdbc6_g.jar JDBCexample

