I am trying to execute following program:

import java.util.Properties;
import java.util.ResourceBundle;
import java.util.Enumeration;
import java.util.ArrayList;
import java.io.IOException;
import java.sql.CallableStatement;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.Types;
import java.sql.ResultSet;
import java.sql.SQLException;

class OraTest
{
OraTest()
{
Connection connection = null;
try
{
// Load the JDBC driver
String driverName = "oracle.jdbc.driver.OracleDriver";
Class.forName(driverName);

// Create a connection to the database
String serverName = "127.0.0.1";
String portNumber = "1521";
String sid = "ram";
String url = "jdbc:oracle:thin:@" + serverName + ":" + portNumber +
":" + sid;
String username = "scott";
String password = "tiger";
connection = DriverManager.getConnection(url, username, password);

}

catch (ClassNotFoundException e)
{
// Could not find the database driver

}

catch (SQLException e)
{
// Could not connect to the database

}
}

public static void main(String[] args)
{
System.out.println("Hello World!");

}
}

---------------------------------------------------------------
I am getting following error:

OraTest.java:31: cannot find symbol
symbol : variable DriverManager
location: class OraTest
connection = DriverManager.getConnection(url,
username,
password);
^
1 error

I have added classpath also. Here is my classpath:
C:\oracle\ora81\jdbc\lib\classes12.zip;D:\oracle\jdbc\lib\classes12.zip
Please guide..

Regards
Satya