Java база данных

package workwithdb;
import java.sql.*;
 
public class WorkWithDB {
    public static void main(String[] args){
        System.out.println("MySQL Connect Example.");
        Connection conn = null;
        String url = "jdbc:mysql://localhost:1527/";
        String dbName = "simple";
        String driver = "org.apache.derby.jdbc.ClientDriver";
        String userName = "usern";
        String password = "user";
        try{
            Class.forName(driver).newInstance();
            conn = DriverManager.getConnection(url+dbName, userName,password);
            System.out.println("Connected to the database");
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}

MySQL Connect Example.
java.lang.ClassNotFoundException: org.apache.derby.jdbc.ClientDriver
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:186)
    at workwithdb.WorkWithDB.main(WorkWithDB.java:18)
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