java applet for customer display hardware

import javax.swing.JApplet;
import java.awt.Graphics;
import gnu.io.*;
import java.io.*;
import java.util.*;
 
/**
 * Class declaration
 *
 *
 * @author
 * @version 1.10, 08/04/00
 */
public class PortChooser extends JApplet {
    static Enumeration	      portList;
    static CommPortIdentifier portId;
    static String	      messageString = "Deddy Keren";
    static SerialPort	      serialPort;
    static OutputStream       outputStream;
    static boolean	      outputBufferEmptyFlag = false;
    /**
     * Method declaration
     *
     *
     * @param args
     *
     * @see
     */
    
    public void paint(Graphics g) {
	//Draw a Rectangle around the applet's display area.
        g.drawRect(0, 0, 
		   getWidth() - 1,
		   getHeight() - 1);
 
	//Draw the current string inside the rectangle.
        //g.drawString("aaa", 5, 15);
       
        
    }
 
    
    public static void main(String[] args) {
	boolean portFound = false;
	String  defaultPort = "COM3";
 
	if (args.length > 0) {
	    defaultPort = args[0];
	} 
 
	portList = CommPortIdentifier.getPortIdentifiers();
 
	while (portList.hasMoreElements()) {
	    portId = (CommPortIdentifier) portList.nextElement();
 
	    if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
 
		if (portId.getName().equals(defaultPort)) {
		    System.out.println("Found port " + defaultPort);
 
		    portFound = true;
 
		    try {
			serialPort = 
			    (SerialPort) portId.open("SimpleWrite", 2000);
		    } catch (PortInUseException e) {
			System.out.println("Port in use.");
 
			continue;
		    } 
 
		    try {
			outputStream = serialPort.getOutputStream();
		    } catch (IOException e) {}
 
		    try {
			serialPort.setSerialPortParams(9600, 
						       SerialPort.DATABITS_8, 
						       SerialPort.STOPBITS_1, 
						       SerialPort.PARITY_NONE);
		    } catch (UnsupportedCommOperationException e) {}
	
 
		    try {
		    	serialPort.notifyOnOutputEmpty(true);
		    } catch (Exception e) {
			System.out.println("Error setting event notification");
			System.out.println(e.toString());
			System.exit(-1);
		    }
		    
		    
		    System.out.println(
		    	"Writing \""+messageString+"\" to "
			+serialPort.getName());
 
		    try {
			outputStream.write(messageString.getBytes());
		    } catch (IOException e) {}
 
		    try {
		       Thread.sleep(2000);  // Be sure data is xferred before closing
		    } catch (Exception e) {}
		    serialPort.close();
		    System.exit(1);
		} 
	    } 
	} 
 
	if (!portFound) {
	    System.out.println("port " + defaultPort + " not found.");
	} 
    } 
 
 
}