Reading form serial port problem

Question

I'm using javax.comm for communicating with a microcontroller (the uc just sends data ->"data from uc"). Here is what is read from the serial port. Where is the problem?
the code:
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.comm.*;
public class ss extends Frame implements WindowListener,ActionListener,KeyListener {
     TextField text = new TextField(20);
     Button inainte;
     Button inapoi;
     Button stanga;
     Button dreapta;
     Button stop;
SerialPort serialPort1, serialPort2;
test2 df=new test2();
     Label msg_stop=new Label("am un obiect in fata! ");
     TextArea displayArea;
     Panel panel;
     Panel displayPanel;
     Integer i;
     /*     public static void main(String[] args)
          test df=new test();
          //     df.dumpFrame();
               df.sendCommand("a");
          System.out.println("serial port successfully opened!");
     CommPortIdentifier portId1;
     CommPortIdentifier portId2;
     class test2 extends Thread
          serialComm mySerial;
          char var_ser,a;
          public String misc;
          test2()
                    try {
                         portId1 = CommPortIdentifier.getPortIdentifier("COM1");
                         portId2 = CommPortIdentifier.getPortIdentifier("COM2");
                         // cs a=new cs();
               catch
                    (Exception e) {
                    // TimeStamp = new java.util.Date().toString();
                    // System.out.println(TimeStamp + ": COM1 " + portId1);
                    // System.out.println(TimeStamp + ": COM2 " + portId2);
                    // System.out.println(TimeStamp + ": msg1 - " + e);}
                    try{             
     // serialPort1 = (SerialPort) portId1.open("ss", 2000);
          catch
     (Exception e2){};
               mySerial=new serialComm("1");
          // serialPort1=(SerialPort)mySerial;
     public void run()
          while(true) {
               // var_ser=mySerial.readByte();           
               // mySerial.writeStr("!andi");
               //try{
               //     sleep(200);
               // }catch(InterruptedException e){};
               a=mySerial.readByte();
System.out.println(a);
          //     if(var_ser=='r') {
          //          System.out.println("dsadsa");
          //     mySerial.writeStr(misc);     
          //     misc="id";
          //     if(var_ser=='o'&& misc=="sp"){
          //     misc="id";
          //     msg_stop.setVisible(true);
          // System.out.println("Sunt in task1 "+misc+" "+var_ser+" end ");
          try{
               sleep(200);
          }catch(InterruptedException e){};
     Flushes all data out of the serial file buffer
     int pixels[];
     public void dumpFrame()
          char a,c,k,r;
          int data=1, pix;
          int row,col=0;
          int count=0;
     //     pixels=new int[900];
     //     MemoryImageSource source;
     //     Image image;
     //          source = new MemoryImageSource(30,30,pixels,0,30);
     //          source.setAnimated(true);
     //          image=createImage(source);
          //     source.newPixels(0,0,30,30);
     //     mySerial.writeStr("DF\r");
          while(col==0){
          data=mySerial.readNonBlock();
          System.out.println(data);
          if(data==1) // New frame
               System.out.println("este 1 ! !");
          else
     if(data==2) // New col
          System.out.println("este 2 ! !");
          System.out.println("count este : "+count);
          count=0;
     else
          count++;
          /* else{
               if (data==0) {
                    'System.out.println("count este"+count);
          // if(!sendCommand("DF\r")) return 0;
          /* sendCommand("L1 1");
               //data=mySerial.readNonBlock();
          while(data!=0)
               sendCommand("L1 1");
               if(data==1) // New frame
                    col=0;
                    row=0;
               else if(data==2) // New col
                    col+=2;
                    row=0;
               else if(data==3) // End frame
                    row=0;
                    col=0;
               //     return 0;
               else
               {  // A pixel!
                    int red,green,blue,green2;
                    red=data;
                    green=mySerial.readByte();
                    blue=mySerial.readByte();
                    green2=green;
                    pix=0;
                    pix+=blue;
                    pix+=green<<8;
                    pix+=red<<16;
                    Color pixColor= new Color(pix);
                    pix=0;
                    pix+=blue;
                    pix+=green2<<8;
                    pix+=red<<16;     
                    Color pixColor2= new Color(pix);
          //     data=mySerial.readNonBlock();
          public void sendCommand(String command)
          char a,c,k,r;
          a=0;
     //     mySerial.writeStr("DF\r");
          //mySerial.writeStr("1");
          while(true){
               try
          a=mySerial.readByte();
     //     if (a=='r') {
          //mySerial.writeStr("!and");
     //     'a=0;
          //     System.out.println(trimit !!!");
               //     mySerial.writeStr(command);
//     a=mySerial.readByte();
          //     c=mySerial.readByte();
     //          k=mySerial.readByte();
     //     r=mySerial.readByte();
          //     if(a=='A' && c=='C' && k=='K' && r=='\r' )
                    //return true;
          //     else
               //     return false;
          }catch(Exception e) {System.out.println(e);}
          //return false;
          System.out.println(a);
     private int numClicks = 0;
public void keyTyped(KeyEvent e) {
     int keyCode = e.getKeyCode();
     System.out.println("Buton Apasat !"+keyCode);
/** Handle the key pressed event from the text field. */
public void keyPressed(KeyEvent e) {
     int keyCode = e.getKeyCode();
     System.out.println("Buton Apasat !"+keyCode);
     switch(keyCode){
     case 38: df.misc="fa";
/** Handle the key released event from the text field. */
public void keyReleased(KeyEvent e) {
public ss(String title) {
          super(title);
//      df.dumpFrame();
//     df.sendCommand("a");     
          //df.start();
//          df.misc="id";
     //     test2 df=new test2();
          //     df.dumpFrame();
     //     df.sendCommand("a");
          Panel panel = new Panel();
     Panel displayPanel = new Panel();
          addWindowListener(this);
     //     displayPanel
          displayPanel.add(panel);
     //     text.addKeyListener(this);
          inainte = new Button("Inainte");
          inapoi = new Button("Inapoi");
          stanga = new Button("Stanga");
          dreapta = new Button("Dreapta");
          stop = new Button("Stop");
          panel.setLayout(new BorderLayout());
     msg_stop.setBackground(Color.red);
     msg_stop.setFont( new Font ( "Dialog", 30, Font.ROMAN_BASELINE ));
          msg_stop.setVisible(false);
     displayArea = new TextArea(5, 20);
          //panel.add(displayArea);
     panel.setLayout(new BorderLayout());
          panel.add(inainte,BorderLayout.NORTH);
          panel.add(inapoi,BorderLayout.SOUTH);
          panel.add(stanga,BorderLayout.WEST);
          panel.add(dreapta,BorderLayout.EAST);
          panel.add(stop);
          //panel.add(msg_stop,BorderLayout.EAST);
          //panel.add(text);
          this.add("Center",displayPanel);
          inainte.addActionListener(this);
          inapoi.addActionListener(this);
          stanga.addActionListener(this);
          dreapta.addActionListener(this);
          stop.addActionListener(this);
          this.setVisible(true);     
          inainte.addKeyListener(this);
          inapoi.addKeyListener(this);
          stanga.addKeyListener(this);
          dreapta.addKeyListener(this);
          stop.addKeyListener(this);
     //     addKeyListener(this);
     //     displayArea.addKeyListener(this);
     public static void main(String[] args) {
          ss myWindow = new ss("Boe Bot " +
                    "Control");
          //myWindow.setSize(300,300);
          myWindow.setLocation(400, 200);
          myWindow.setSize(200,300);
          myWindow.setVisible(true);
     public void actionPerformed(ActionEvent e) {
          String command=e.getActionCommand();
     if(command.equals("Inainte")){
          System.out.println("Inaite !!! ");     
          df.misc="fa";}
     if(command.equals("Inapoi")){
          System.out.println("Inapoi !!! ");     
          df.misc="sp";}
     if(command.equals("Stanga")){
          System.out.println("Inapoi !!! ");     
          df.misc="st";}
     if(command.equals("Dreapta")){
          System.out.println("Dreapta !!! ");     
          df.misc="dr";}
     if(command.equals("Stop")){
          System.out.println("Stop !!! ");     
          df.misc="id";}
     //     numClicks++;
     //     text.setText("Button Clicked " + numClicks + " times");
     public void windowClosing(WindowEvent e) {
          dispose();
          System.exit(0);
     public void windowOpened(WindowEvent e) {}
     public void windowActivated(WindowEvent e) {}
     public void windowIconified(WindowEvent e) {}
     public void windowDeiconified(WindowEvent e) {}
     public void windowDeactivated(WindowEvent e) {}
     public void windowClosed(WindowEvent e) {}
thanks,
andi

Answer 1

from the screenshot it looks like there is 2 bytes of "noise" after every 8 bytes?
print the char array next to the String. are the 2 bytes of noise the same every time?