why I can't connect to Mysql using JDBC? Thank You!!!

[chrainy]

Can anyone give me a suggestion about this simple test code?
---------------------------------------------------------------------------------------------
import java.sql.*;

public class sql
{
public static void main (String[] args)
{
Connection conn = null;

try
{
String userName = "root";
String password = "root";
String url = "jdbc:mysql://localhost/sysops/";
Class.forName ("com.mysql.jdbc.Driver").newInstance ();
conn = DriverManager.getConnection (url, userName, password);
System.out.println ("Database connection established");
}
catch (Exception e)
{
System.err.println ("Cannot connect to database server");
e.printStackTrace();
}
finally
{
if (conn != null)
{
try
{
conn.close ();
System.out.println ("Database connection terminated");
}
catch (Exception e) {
e.printStackTrace();
/* ignore close errors */ }
}
}
}
}
-----------------------------------------------------------------------------------------------------------
I use the stack trace, and get this err msg when I run it, google without achievement-_-
-------------------------------------------------------------------------------------------------
java.sql.SQLException: Incorrect database name 'sysops/'
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.ja va:2975)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.ja va:79
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java: 3700)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:12 03)
at com.mysql.jdbc.Connection.createNewIO(Connection.j ava:256
at com.mysql.jdbc.Connection.<init>(Connection.java:1 485)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonReg isteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager .java:525)
at java.sql.DriverManager.getConnection(DriverManager .java:171)
at sql.main(sql.java:15)
----------------------------------------------------------------------------------------------------------------

I have a database named sysops in /var/lib/mysql/sysops
----------------------------------------------------------------------------------------------------------------
drwx------ 2 mysql mysql 72 2007-02-15 20:32 bedrock
-rw-rw---- 1 mysql mysql 10485760 2007-02-16 09:51 ibdata1
-rw-rw---- 1 mysql mysql 5242880 2007-02-16 10:25 ib_logfile0
-rw-rw---- 1 mysql mysql 5242880 2007-01-08 12:25 ib_logfile1
drwx------ 2 mysql mysql 1752 2007-02-15 20:37 mysql
-rw-rw---- 1 mysql mysql 3578 2007-02-16 10:25 mysqld.log
-rw-rw---- 1 mysql mysql 5 2007-02-16 10:25 mysqld.pid
srwxrwxrwx 1 mysql mysql 0 2007-02-16 10:25 mysql.sock
drwx------ 2 mysql mysql 168 2007-02-15 20:58 sysops
-----------------------------------------------------------------------------------------------------

I don't know, Thanks for your kind help,