Help me please.

I copy the folloiwng program from oracle hompage http://technet.oracle.com/doc/java.815/a64685/getsta3.htm#1001200

import java.sql.*;
import oracle.jdbc.driver.*;

class JDBCVersion
{
public static void main (String args []) throws SQLException
{
// Load the Oracle JDBC driver

DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); Connection conn =
DriverManager.getConnection("jdbc:oracle:thin:@:1588localhost:sid","username","password");

// Create Oracle DatabaseMetaData object
DatabaseMetaData meta = conn.getMetaData ();

// gets driver info:

System.out.println("JDBC driver version is " + meta.getDriverVersion()); }
}

sid is the sid of my database. username and password is the login username and password.
I haven't changed the port nubmer. Is it true that the default port is 1588?

When I run the program, the following error occur: java.sql.SQLException: Io exception: The Network Adapter could not establish the connection

	at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java)
	at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java)
	at
oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java)
	at
oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java)
	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java)
	at java.sql.DriverManager.getConnection(Compiled Code)
	at java.sql.DriverManager.getConnection(DriverManager.java:126)
	at JDBCVersion.main(JDBCVersion.java:11)

How can I solve the problem?

Very urgent, if possible, please reply me by e-mail. Thank you very much!

--