How do I hide the MSDOS window in a Java exec( <DOS cmd> )?

I'm using Java's Runtime.exec() to set the parameters of a serial port (WinNT40). This works fine, except that the mode.com file needs a command interpreter to run. This too, is o.k., but in the process of running it flashes an MSDOS window on the screen. Does anyone know of a way to hide this  annoying feature?

I'd like this to run without the MSDOS window popping up and disappearing. BTW, I tried removing the "cmd.exe /c" part of the exec command, but that results in the mode command hanging my application and keeping the port busy until I kill it with NT's task manager. I've also tried adding the /q switch to NT40's cmd.exe but the pop-up window persisted.  Maybe this is an MSDOS question...

Anyway, here is the code (JVM 1.1). If anyone can find me a work-around I'd appreciate it!  
 
 

import java.io.*;

public class SerialTest
{
        public static void main( String args[] )
        {
                Runtime rt = Runtime.getRuntime();
                Process p = null;
                String portname = "com1:";
                String cmd[] = {"c:\\winnt\\system32\\cmd.exe", "/c",
                                               
"c:\\winnt\\system32\\mode.com", portname,
                                                "baud=9600", "parity=n",
"data=8",
                                                "stop=1", "to=on",
"xon=on", "octs=off", "odsr=off",
                                                "dtr=hs", "rts=hs" };
                try
                {
                        p = rt.exec( cmd );
                        if( p.waitFor() != 0 )
                        {
                                System.out.println("Error executing
command: " + cmd );
                                System.exit( -1 );
                        }
                        byte data[] = "This is a test of Java writing a
byte stream out of a serial port.".getBytes();
                        FileOutputStream fos = new FileOutputStream(
portname );
                        BufferedOutputStream bos = new
BufferedOutputStream( fos );
                        fos.write( data, 0, data.length );
                        fos.close();
                }
                catch( Exception e )
                {
                        System.out.println("exception: " +
e.getMessage());
                        e.printStackTrace();
                }
        }
}