USB and serial port access in java

Question

Hi
I have a magstripe card reader connected to my computer with a USB interface (port).
I am using javax.comm API to get the card swipe data but could not succeeded.
Can i do that or have to do something else ???

Answer 1

ok. Below is my code:
this is a sample code come with the API.
package msr;
* @author Dell
import java.io.*;
import java.util.*;
import javax.comm.*;
* Class declaration
* @author
* @version 1.8, 08/03/00
public class SimpleRead implements Runnable, SerialPortEventListener {
    static CommPortIdentifier portId;
    static Enumeration           portList;
    InputStream                inputStream;
    SerialPort                serialPort;
    Thread                readThread;
     * Method declaration
     * @param args
     * @see
    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;
              SimpleRead reader = new SimpleRead();
     if (!portFound) {
         System.out.println("port " + defaultPort + " not found.");
     * Constructor declaration
     * @see
    public SimpleRead() {
     try {
         serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
     } catch (PortInUseException e) {}
     try {
         inputStream = serialPort.getInputStream();
     } catch (IOException e) {}
     try {
         serialPort.addEventListener(this);
     } catch (TooManyListenersException e) {}
     serialPort.notifyOnDataAvailable(true);
     try {
         serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8,
                            SerialPort.STOPBITS_1,
                            SerialPort.PARITY_NONE);
     } catch (UnsupportedCommOperationException e) {}
     readThread = new Thread(this);
     readThread.start();
     * Method declaration
     * @see
    public void run() {
     try {
         Thread.sleep(20000);
     } catch (InterruptedException e) {}
     * Method declaration
     * @param event
     * @see
    public void serialEvent(SerialPortEvent event) {
     switch (event.getEventType()) {
     case SerialPortEvent.BI:
     case SerialPortEvent.OE:
     case SerialPortEvent.FE:
     case SerialPortEvent.PE:
     case SerialPortEvent.CD:
     case SerialPortEvent.CTS:
     case SerialPortEvent.DSR:
     case SerialPortEvent.RI:
     case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
         break;
     case SerialPortEvent.DATA_AVAILABLE:
         byte[] readBuffer = new byte[20];
         try {
          while (inputStream.available() > 0) {
              int numBytes = inputStream.read(readBuffer);
          System.out.print(new String(readBuffer));
         } catch (IOException e) {}
         break;
}