Unable to send command to smart card reader

Question

i am writing code for reading/writing to a smart card through a smart card reader which support RS232 serial communication.
Problem is that the reader is not responding to the commands i send to it.
My Smart CArd reader (HID 6055 Mifare Smart CArd reader) sends some ack when it is switched on. That data i am able to receive though the following code.
So i think i am unable to write (send command ) to the reader.
Also how do i debug my code to see whether the command is actually being sent or not. I tried hyper terminal but if i use hyper terminal then the java prog is not able to open an OtputStream for writing to the smart card.
I appreciate your kind help...
My prog is
*The
import javax.comm.*;
import java.io.*;
import java.util.Enumeration;
import java.util.TooManyListenersException;
public class SmartCard
     public static void main(String args[])
          CardReader cs=new CardReader();
          cs.setConnectionParameters();
          if(cs.scanForCard())
               System.out.println("Successfully sent Scan command to the reader");
class CardReader implements SerialPortEventListener //,CommPortOwnershipListener
     CommPortIdentifier portId;
     Enumeration portList;
     InputStream inputStream;
     OutputStream outputStream;
     SerialPort serialPort;
     String outputString="";
     String inputSting="";
     public CardReader()
          portList = CommPortIdentifier.getPortIdentifiers();
           while (portList.hasMoreElements())
            portId = (CommPortIdentifier) portList.nextElement();
            if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL)
                 if (portId.getName().equals("COM1"))
                         System.out.println("Port Found");
                         break;
     public void setConnectionParameters()
          System.out.println("Setting Parameters for "+portId.getName());
          try
            serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
        catch (PortInUseException e)
             System.out.println("PortInUseException in CardReader.setConnectionParameters :"+e);
         try
              serialPort.addEventListener(this);
          catch (TooManyListenersException e)
               System.out.println("Error in adding EventListener to serial Port: "+e);
        try
            inputStream = serialPort.getInputStream();
        catch (IOException e)
             System.out.println("IoException in CardReader.setConnectionParameters while setting inputStream :"+e);
        try
            outputStream = serialPort.getOutputStream();
        catch (IOException e)
             System.out.println("IoException in CardReader.setConnectionParameters while setting outputStream :"+e);
          serialPort.notifyOnDataAvailable(true); //We will check for
          try
            serialPort.setSerialPortParams(9600,SerialPort.DATABITS_8,SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);
        catch (UnsupportedCommOperationException e)
             System.out.println("Exception in setting the Baud Rate: "+e);
     public boolean scanForCard()
          boolean result=false;
          outputString="AA521D26000A";//Command for Scanning a Card
          // outputString="AA4C280810201C";
          // byte[] cmd=new byte[]{'A','A','5','2','1','D','2','6','0','0','0','A'};
          byte[] cmd=new byte[]{'8','0','4','C','2','8','0','8','1','0','2','0','1','C'};
          try
             //outputStream.write(outputString.getBytes());
             outputStream.write(cmd);
             result=true;
        catch (IOException e)
             System.out.println("Error in writing scan command to smart card: "+ e);
             result=false;
          return result;
     public void serialEvent(SerialPortEvent event)
          System.out.println("\nSome Event Occured");
          switch(event.getEventType())
             case SerialPortEvent.BI: System.out.println("event no 1");
             case SerialPortEvent.OE: System.out.println("event no 2");
             case SerialPortEvent.FE: System.out.println("event no 3");
             case SerialPortEvent.PE: System.out.println("event no 4");
             case SerialPortEvent.CD: System.out.println("event no 5");
             case SerialPortEvent.CTS: System.out.println("event no 6");
             case SerialPortEvent.DSR: System.out.println("event no 7");
             case SerialPortEvent.RI: System.out.println("event no 8");
             case SerialPortEvent.OUTPUT_BUFFER_EMPTY: {System.out.println("event no 9");
                  break;}
             case SerialPortEvent.DATA_AVAILABLE:{System.out.println("event no 10");
                  readDataFromReader();}
                  break;
     public void readDataFromReader()
          System.out.print("Some data Sent by the Smart Card");
          byte[] readBuffer = new byte[20];
        try
             while (inputStream.available() > 0)
                 int numBytes = inputStream.read(readBuffer);
         System.out.print(new String(readBuffer));
         catch (IOException e)
              System.out.println("Some Error Occured in reading the data sent by Reader: "+e);

Answer 1

hi all..
Im new to this technology and wanna learn and try to program some simple applications using Smart Card...
Reading thru all the topics above, Im wonderring is the Card Reader able write codes to the Smart Card, or maybe jux simply able to update the info inside the card??
I also heard about Card Decoder as well, I mean if the Card Reader can do the task.. why do we need Card Decoder ?!
Sorry if I stated something wrong... Im new and hope that someone could share some valuable knowledges here...
Thanks much much !!