Self defined Event processing problem

Question

Hi every1�Cthe situation is like the following:
2 PCs communicate through Bluetooth serial port profile by 3 classes that i wrote.
First, BluetoothManger, it implements SerialportEventListener of Javax.comm package,its job is to read the incoming data from the other end and store them into an array,and it works.
Second,DataReceiver,it implements EventObject, so whenever it copies the array from BluetoothManger, it will pass them into the next stage Algorithm.
Third,Algorithm., it implements EventListener, it has function @public void dataChanged(DataReceiver dr)@, this function is causing a loop to run forever
The other end is sending 20 numbers each frame,and there are only 10 frames,but once the sender side start sending stuff, the receiver end kept running forever...
The following is the code,thanks very much in advance for anybody's voice!!!
import java.io.*;
import java.util.*;
import javax.comm.*;
public class BluetoothManager implements SerialPortEventListener{
     static CommPortIdentifier portId;
    static Enumeration portList;     
     InputStream inputStream;
    SerialPort serialPort;
       DataReceiver dr;
       Convert c;
       byte[] tempBuffer;
       byte[] smallArray;
       int[] intArray;
       int[] ints;
       int k;
    int h;
    public BluetoothManager()
         tempBuffer=new byte[100];
         smallArray=new byte[100];
         ints=new int[20];
         intArray=new int[230];
         dr=new DataReceiver(ints);
         c=new Convert();
         k=0;
         h=0;
    public void listenToPort()
          portList=CommPortIdentifier.getPortIdentifiers();
          while(portList.hasMoreElements()){
               portId = (CommPortIdentifier) portList.nextElement();
               if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL){
                    System.out.println("found..." + portId.getName());
                    if (portId.getName().equals("COM6")){// 4
                         try {
                           System.out.println("about to try.." + portId.getName());
                           serialPort = (SerialPort) portId.open("SerialPort", 2000);
                       } catch (PortInUseException e) { System.out.println("Exception: Port in use!"); }
                       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) {}
    public int[] storeFrameArray(byte[] temp)
          smallArray=temp;          
          for(int i=0;i<20;i++){
               byte[] temp2=new byte[4];
               System.arraycopy(smallArray,k,temp2,0,4);
               ints=c.toInt(temp2);
               k=k+4;
               if (k>=80) k=0;               
          return ints;
     public DataReceiver getDataRX(){
          return dr;
     public void serialEvent(SerialPortEvent event)
switch(event.getEventType()) {
     case SerialPortEvent.DATA_AVAILABLE:
          try{
               while(inputStream.available()>0){
                    inputStream.read(tempBuffer);
                              dr.setArray(this.storeFrameArray(tempBuffer));
          }catch(IOException e){           }
     break;
import java.util.*;
public class DataReceiver extends EventObject{
     int[] rxArray;
     int h;
    boolean dataChangedFlag;
     public DataReceiver(int[] ints)
          super(ints);
          rxArray=new int[20];
          dataChangedFlag=false;
         h=0;
     public void setArray(int[] array)
          System.arraycopy(array,0,rxArray,0,20);
         dataChangedFlag=true;
     public int[] getIntArray()
          return rxArray;
     public boolean getFlag()
          dataChangedFlag=false;
          return dataChangedFlag;
     public void addDataReceiverListener(Algorithm algo)
          while(dataChangedFlag=true){
               algo.dataChanged(this);
import java.util.*;
public class Algorithm implements EventListener {
     boolean finishFlag;
     int[] alArray;
     int[] partInts;
     int[] events;
     int eventIndex;
     int[] dd;
     int i;
     int result;
     DataReceiver drr;
     public Algorithm(BluetoothManager bMAL)
          drr=bMAL.getDataRX();
          finishFlag=false;
          alArray=new int[230];
          partInts=new int[20];
          events=new int[500];
          dd=new int[20];
          result=0;
          eventIndex=0;
          drr.addDataReceiverListener(this);     
     public void calculate(int[] intss)
          for(int i=0;i<20;i++)dd=intss[i]*5;     
          for(int j=0;j<20;j++){
               if(dd[j]<100&&dd[j]>50){
               events[eventIndex]=dd[j];
               System.out.println("Index"+eventIndex+":"+dd[j]);
               eventIndex++;
     public void dataChanged(DataReceiver data)
          data.getFlag();
          partInts=data.getIntArray();
          calculate(partInts);
Thanks again

Answer 1

> Hi every1�Cthe situation is like the following:
What?
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