How does one connect with the JDBC KPRB Driver?

One can obtain a handle to the default or current connection (KPRB driver) by calling the OracleDriver.defaultConenction() method. Please note that you do not need to specify a database URL, username or password as you are already connected to a database session. Remember not to close the default Connection. Closing the default connection might throw an exception in future releases of Oracle.

import java.sql.*;
class dbAccess {
  public static void main (String args []) throws SQLException
  {
        Connection conn = (new oracle.jdbc.driver.OracleDriver()).defaultConnection();

        Statement stmt = conn.createStatement();
        ResultSet rset = stmt.executeQuery("select BANNER from SYS.V_$VERSION");
        while (rset.next())
              System.out.println (rset.getString(1));   // Print col 1
        stmt.close();
  }
}