embedded derby - doesn't start automatically

[bill steve]

If i start the derby database manually inside netbeans, my java desktop app works. if not, i get an sql 8001 reason code 4000 - connection refused. From the Apache docs, it seems that it should start automatically. I quote:

Load the Embedded JDBC Driver
The SimpleApp application loads the Derby Embedded JDBC driver and starts Derby up with this code:

public String driver = "org.apache.derby.jdbc.EmbeddedDriver";
...
Class.forName(driver).newInstance();

etc.....

i think i'm doing this...........my code is below. Anybody have any thoughts?

private String framework = "embedded";
    private String driver = "org.apache.derby.jdbc.EmbeddedDriver";
    private String protocol = "jdbc:derby:";

    public DemandDatabase() {
        System.out.println("in constructor ");
    }

    public ArrayList go() 
    {
        System.out.println("about to load the driver in ");
        [b]loadDriver();[/b]
        Connection conn = null;

        try {
            Properties props = new Properties(); // connection properties
            props.put("user", "nbuser");
            props.put("password", "nbuser");
            String dbName = "//localhost:1527/users"; // the name of the database
            conn = DriverManager.getConnection(protocol + dbName                            [b](dies on this statement)[/b]
                    + ";create=false", props);

    private void loadDriver() {
        try {
           [b] Class.forName(driver).newInstance();[/b]
            System.out.println("Loaded the appropriate driver");   
        } catch (ClassNotFoundException cnfe) {
            System.err.println("\nUnable to load the JDBC driver " + driver);
            System.err.println("Please check your CLASSPATH.");
            cnfe.printStackTrace(System.err);
        } catch (InstantiationException ie) {
            System.err.println(
                    "\nUnable to instantiate the JDBC driver " + driver);
            ie.printStackTrace(System.err);
        } catch (IllegalAccessException iae) {
            System.err.println(
                    "\nNot allowed to access the JDBC driver " + driver);
            iae.printStackTrace(System.err);
        }
    }

moderator: added code tags

[Andrey Kozhanov]

I suppose the problem is in your dbName. 'url' parameter in DriverManager.getConnection method should be of the form 'jdbc:subprotocol:subname', but in your case it is 'jdbc:subprotocol:something:something'.