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JAVA Socket object + text

Does it possible, to get from client and
objetObjectInputStream
and
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
for example, some client send me tet message, and someone send files. Should I make a new socket server for each?
public class ServerRequests {
Connection con = new Connection();
private Socket socket;
private BufferedReader in;
private BufferedWriter out;
public ServerRequests(Socket socket) throws IOException {
this.socket = socket;
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
run();
}
public void run() {
String word;
try {
String object;
ObjectInputStream obIn = new ObjectInputStream(socket.getInputStream());
while ((object = (String) obIn.readObject()) != null){
if (object.contains("F47S")){
String[] result = object.split(":");
String fileName = result[1];
String url = result[2];
String culture = result[3];
System.out.println("FileName:" +fileName);
System.out.println("url:" +url);
FileOutputStream outOb = null;
if(culture.contains("test")) {
outOb = new FileOutputStream(fileName);
}
DataInputStream inOb = new DataInputStream(socket.getInputStream());
byte[] bytes = new byte[5*1024];
int count, total=0;
long lenght = inOb.readLong();
while ((count = inOb.read(bytes)) > -1) {
total+=count;
outOb.write(bytes, 0, count);
if (total==lenght) break;
}
outOb.close();
}
}
}catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
// while (true) {
word = in.readLine();
System.out.println(word);
if (word != null) {
String[] result = word.split(":");
String type = result[0];
if (type.contains("AUTH")) {
String login = result[2];
String pass = result[4];
String gui = con.checkLogin(pass, login);
auth(gui);
}
} catch (IOException e) {
}
}
private void auth(String gui) {
try {
out.write(gui + "\n");
out.flush();
} catch (IOException ignored) {
}
}
private void success(String status) {
try {
out.write(status+ "\n");
out.flush();
} catch (IOException ignored) {
}
}
}

Java JSSC serial read consuming 100% CPU

I am trying to read GPS data from a serial port(ttyACM0) in java using jssc jar which I need to display as a label in a JavaFx application. I have a created a thread for reading the GPS data but this thread is consuming 100% CPU(checked using top command + Shift H) because of which my GUI is getting freezed. This is a sample code I have written for reading GPS data
Serial Interface
import jssc.*;
public class SerInterface {
String portName;
int baud;
boolean lineMode;
// The chosen Port itself
SerialPort port;
public byte[] recvBuff;
public SerInterface(String portName, int baud, boolean lineMode) {
this.portName = portName;
this.baud = baud;
this.lineMode = lineMode;
recvBuff = new byte[8192];
openPort();
if((port == null) || (!port.isOpened()))
System.out.println(portName + " not opened successfully");
}
void openPort() {
port = new SerialPort(portName);
if(port == null)
return;
try {
port.openPort();
} catch (SerialPortException e) {
e.printStackTrace();
}
try {
if(port.isOpened())
port.setParams(SerialPort.BAUDRATE_9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
else
return;
} catch (SerialPortException e) {
e.printStackTrace();
}
System.out.println(portName + " opened successfully");
}
public int recvData() {
int len = 0;
if(port.isOpened()) {
try {
byte[] buff = port.readBytes();
if((buff == null) || (buff.length == 0))
return 0;
len = buff.length;
if(len > recvBuff.length)
len = recvBuff.length;
System.arraycopy(buff, 0, recvBuff, 0, len);
buff = null;
} catch (SerialPortException e) {
e.printStackTrace();
}
}
return len;
}
public void sendData(byte[] sendBuff, int len) {
if(port.isOpened()) {
try {
port.writeBytes(sendBuff);
} catch (SerialPortException e) {
e.printStackTrace();
}
}
}
public boolean validatePort() {
if(!port.isOpened()) {
openPort();
if(port.isOpened())
return true;
else
return false;
}
else
return true;
}
public void flushPort() {
if(port.isOpened()) {
try {
port.purgePort(SerialPort.PURGE_RXCLEAR | SerialPort.PURGE_TXCLEAR);
} catch (SerialPortException e) {
e.printStackTrace();
}
}
}
public void closePort() {
if(port.isOpened()) {
try {
port.closePort();
System.out.println("port closed");
} catch (SerialPortException e) {
e.printStackTrace();
}
}
}
}
GPSReceiver thread extends SerInterface and implements Runnable
#Override
public void run() {
flushPort();
while(true) {
if(!validatePort()) {
try {
sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
continue;
}
int dataLength = recvData();
if(dataLength < 2)
continue;
try {
InputStream gpsStream = new ByteArrayInputStream(recvBuff, 0, dataLength);
BufferedReader br = new BufferedReader(new InputStreamReader(gpsStream, StandardCharsets.US_ASCII));
while(true) {
try {
if (!((output = br.readLine()) != null)) break;
} catch (IOException e) {
e.printStackTrace();
}
extractData();
}
}
catch(NullPointerException e) {
e.printStackTrace();
}
}
Main Thread
GPSInterface objGPSThreadInterface = new GPSInterface(GPSPortName, 9600, true);
GPSThreadInt = new Thread(objGPSThreadInterface, "GPSINT");
I am using jdk-13.0.1 and jssc-2.9.1 jar

Java Voice Chat Error

I am making a voice chat program. I have two servers one for voice and one for messages. When I connect two people I get this error, Thank you in advance. I attached the client code, ClientAudio code and the Client receive code
java.io.StreamCorruptedException: invalid type code: 00
at java.io.ObjectInputStream$BlockDataInputStream.readBlockHeader(ObjectInputStream.java:2508)
at java.io.ObjectInputStream$BlockDataInputStream.refill(ObjectInputStream.java:2543)
at java.io.ObjectInputStream$BlockDataInputStream.read(ObjectInputStream.java:2702)
at java.io.ObjectInputStream.read(ObjectInputStream.java:865)
at client.chat$ClientAudioRec.run(chat.java:388)
at java.lang.Thread.run(Thread.java:745)
its calling the error on
try {
bytesRead = ((ObjectInput) i2).read(inSound, 0, inSound.length);
} catch (Exception e) {
e.printStackTrace();
}
Code
public class Client implements Runnable { // CLIENT
private String msg;
public void run() {
try {
s1 = new Socket(ipAddress, port);
s2 = new Socket(ipAddress, 1210);
o1 = new ObjectOutputStream(s1.getOutputStream());
o1.writeObject(name);
serverListModel.addElement(name);
i1 = new ObjectInputStream(s1.getInputStream());
Thread voice = new Thread(new ClientAudio());
voice.start();
while(true) {
msg = (String) i1.readObject();
String[] namePart = msg.split("-");
if(namePart[0].equals("AddName") && !namePart[1].equals(name) && !serverListModel.contains(namePart[1])) {
serverListModel.addElement(namePart[1]);
}
if(namePart[0].equals("RemoveName") && !namePart[1].equals(name)) {
serverListModel.removeElement(namePart[1]);
}
if(!msg.equals(null) && !namePart[0].equals("AddName") && !namePart[0].equals("RemoveName")) {
chatWindow.append(msg+"\n");
}
}
} catch (IOException | ClassNotFoundException e) {
chatWindow.append("Server Closed");
e.printStackTrace();
try {
s1.close();
} catch (IOException e1) {
e1.printStackTrace();
}
mainWindow(true);
}
}
}
public class ClientAudio implements Runnable { // CLIENT AUDIO
public void run() {
try {
o2 = new ObjectOutputStream(s2.getOutputStream());
System.out.println("AUDIO");
int bytesRead = 0;
byte[] soundData = new byte[1];
Thread car = new Thread(new ClientAudioRec());
car.start();
while(true) {
bytesRead = mic.read(soundData, 0, bytesRead);
if(bytesRead >= 0) {
o2.write(soundData, 0, bytesRead);
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
public class ClientAudioRec implements Runnable { // CLIENT AUDIO REC
public void run() {
i2 = new ObjectInputStream(s2.getInputStream());
System.out.println("REC");
SourceDataLine inSpeaker = null;
DataLine.Info info = new DataLine.Info(SourceDataLine.class, af);
try {
inSpeaker = (SourceDataLine)AudioSystem.getLine(info);
inSpeaker.open(af);
} catch (LineUnavailableException e1) {
System.out.println("ERROR 22");
e1.printStackTrace();
}
int bytesRead = 0;
byte[] inSound = new byte[100];
inSpeaker.start();
while(bytesRead != -1)
{
try{
bytesRead = ((ObjectInput) i2).read(inSound, 0, inSound.length);
} catch (Exception e){
e.printStackTrace();
}
if(bytesRead >= 0)
{
inSpeaker.write(inSound, 0, bytesRead);
}
}
}
}

program to show a progress bar while transferring all files from one server to another in java

i have written a java code to transfer files from one server to another using the concept of socket programming. now in the same code i also want to check for the network connection availability before each file is transferred. i also want that the files transferred should be transferred according to their numerical sequence. And while the files are being transferred the transfer progress of each file i.e the progress percentage bar should also be visible on the screen.
i will really appreciate if someone can help me with the code. i am posting the code i have written for file transfer.
ClientMain.java
import java.io.*;
import java.net.Socket;
import java.net.SocketException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
public class ClientMain {
private DirectoryTxr transmitter = null;
Socket clientSocket = null;
private boolean connectedStatus = false;
private String ipAddress;
String srcPath = null;
String dstPath = "";
public ClientMain() {
}
public void setIpAddress(String ip) {
this.ipAddress = ip;
}
public void setSrcPath(String path) {
this.srcPath = path;
}
public void setDstPath(String path) {
this.dstPath = path;
}
private void createConnection() {
Runnable connectRunnable = new Runnable() {
public void run() {
while (!connectedStatus) {
try {
clientSocket = new Socket(ipAddress, 3339);
connectedStatus = true;
transmitter = new DirectoryTxr(clientSocket, srcPath, dstPath);
} catch (IOException io) {
io.printStackTrace();
}
}
}
};
Thread connectionThread = new Thread(connectRunnable);
connectionThread.start();
}
public static void main(String[] args) {
ClientMain main = new ClientMain();
main.setIpAddress("10.6.3.92");
main.setSrcPath("E:/temp/movies/");
main.setDstPath("D:/tcp/movies");
main.createConnection();
}
}
(DirectoryTxr.java)
import java.io.*;
import java.net.Socket;
import java.net.SocketException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
public class DirectoryTxr {
Socket clientSocket = null;
String srcDir = null;
String dstDir = null;
byte[] readBuffer = new byte[1024];
private InputStream inStream = null;
private OutputStream outStream = null;
int state = 0;
final int permissionReqState = 1;
final int initialState = 0;
final int dirHeaderSendState = 2;
final int fileHeaderSendState = 3;
final int fileSendState = 4;
final int fileFinishedState = 5;
private boolean isLive = false;
private int numFiles = 0;
private int filePointer = 0;
String request = "May I send?";
String respServer = "Yes,You can";
String dirResponse = "Directory created...Please send files";
String fileHeaderRecvd = "File header received ...Send File";
String fileReceived = "File Received";
String dirFailedResponse = "Failed";
File[] opFileList = null;
public DirectoryTxr(Socket clientSocket, String srcDir, String dstDir) {
try {
this.clientSocket = clientSocket;
inStream = clientSocket.getInputStream();
outStream = clientSocket.getOutputStream();
isLive = true;
this.srcDir = srcDir;
this.dstDir = dstDir;
state = initialState;
readResponse(); //starting read thread
sendMessage(request);
state = permissionReqState;
} catch (IOException io) {
io.printStackTrace();
}
}
private void sendMessage(String message) {
try {
sendBytes(request.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
/**
* Thread to read response from server
*/
private void readResponse() {
Runnable readRunnable = new Runnable() {
public void run() {
while (isLive) {
try {
int num = inStream.read(readBuffer);
if (num > 0) {
byte[] tempArray = new byte[num];
System.arraycopy(readBuffer, 0, tempArray, 0, num);
processBytes(tempArray);
}
} catch (SocketException se) {
System.exit(0);
} catch (IOException io) {
io.printStackTrace();
isLive = false;
}
}
}
};
Thread readThread = new Thread(readRunnable);
readThread.start();
}
private void sendDirectoryHeader() {
File file = new File(srcDir);
if (file.isDirectory()) {
try {
String[] childFiles = file.list();
numFiles = childFiles.length;
String dirHeader = "$" + dstDir + "#" + numFiles + "&";
sendBytes(dirHeader.getBytes("UTF-8"));
} catch (UnsupportedEncodingException en) {
en.printStackTrace();
}
} else {
System.out.println(srcDir + " is not a valid directory");
}
}
private void sendFile(String dirName) {
File file = new File(dirName);
if (!file.isDirectory()) {
try {
int len = (int) file.length();
int buffSize = len / 8;
//to avoid the heap limitation
RandomAccessFile raf = new RandomAccessFile(file, "rw");
FileChannel channel = raf.getChannel();
int numRead = 0;
while (numRead >= 0) {
ByteBuffer buf = ByteBuffer.allocate(1024 * 100000);
numRead = channel.read(buf);
if (numRead > 0) {
byte[] array = new byte[numRead];
System.arraycopy(buf.array(), 0, array, 0, numRead);
sendBytes(array);
}
}
System.out.println("Finished");
} catch (IOException io) {
io.printStackTrace();
}
}
}
private void sendHeader(String fileName) {
try {
File file = new File(fileName);
if (file.isDirectory())
return;//avoiding child directories to avoid confusion
//if want we can sent them recursively
//with proper state transitions
String header = "&" + fileName + "#" + file.length() + "*";
sendHeader(header);
sendBytes(header.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
private void sendBytes(byte[] dataBytes) {
synchronized (clientSocket) {
if (outStream != null) {
try {
outStream.write(dataBytes);
outStream.flush();
} catch (IOException io) {
io.printStackTrace();
}
}
}
}
private void processBytes(byte[] data) {
try {
String parsedMessage = new String(data, "UTF-8");
System.out.println(parsedMessage);
setResponse(parsedMessage);
} catch (UnsupportedEncodingException u) {
u.printStackTrace();
}
}
private void setResponse(String message) {
if (message.trim().equalsIgnoreCase(respServer) && state == permissionReqState) {
state = dirHeaderSendState;
sendDirectoryHeader();
} else if (message.trim().equalsIgnoreCase(dirResponse) && state == dirHeaderSendState) {
state = fileHeaderSendState;
if (LocateDirectory()) {
createAndSendHeader();
} else {
System.out.println("Vacant or invalid directory");
}
} else if (message.trim().equalsIgnoreCase(fileHeaderRecvd) && state == fileHeaderSendState) {
state = fileSendState;
sendFile(opFileList[filePointer].toString());
state = fileFinishedState;
filePointer++;
} else if (message.trim().equalsIgnoreCase(fileReceived) && state == fileFinishedState) {
if (filePointer < numFiles) {
createAndSendHeader();
}
System.out.println("Successfully sent");
} else if (message.trim().equalsIgnoreCase(dirFailedResponse)) {
System.out.println("Going to exit....Error ");
// System.exit(0);
} else if (message.trim().equalsIgnoreCase("Thanks")) {
System.out.println("All files were copied");
}
}
private void closeSocket() {
try {
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private boolean LocateDirectory() {
boolean status = false;
File file = new File(srcDir);
if (file.isDirectory()) {
opFileList = file.listFiles();
numFiles = opFileList.length;
if (numFiles <= 0) {
System.out.println("No files found");
} else {
status = true;
}
}
return status;
}
private void createAndSendHeader() {
File opFile = opFileList[filePointer];
String header = "&" + opFile.getName() + "#" + opFile.length() + "*";
try {
state = fileHeaderSendState;
sendBytes(header.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
}
}
private void sendListFiles() {
createAndSendHeader();
}
}
(ServerMain.java)
public class ServerMain {
public ServerMain() {
}
public static void main(String[] args) {
DirectoryRcr dirRcr = new DirectoryRcr();
}
}
(DirectoryRcr.java)
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
public class DirectoryRcr {
String request = "May I send?";
String respServer = "Yes,You can";
String dirResponse = "Directory created...Please send files";
String dirFailedResponse = "Failed";
String fileHeaderRecvd = "File header received ...Send File";
String fileReceived = "File Received";
Socket socket = null;
OutputStream ioStream = null;
InputStream inStream = null;
boolean isLive = false;
int state = 0;
final int initialState = 0;
final int dirHeaderWait = 1;
final int dirWaitState = 2;
final int fileHeaderWaitState = 3;
final int fileContentWaitState = 4;
final int fileReceiveState = 5;
final int fileReceivedState = 6;
final int finalState = 7;
byte[] readBuffer = new byte[1024 * 100000];
long fileSize = 0;
String dir = "";
FileOutputStream foStream = null;
int fileCount = 0;
File dstFile = null;
public DirectoryRcr() {
acceptConnection();
}
private void acceptConnection() {
try {
ServerSocket server = new ServerSocket(3339);
socket = server.accept();
isLive = true;
ioStream = socket.getOutputStream();
inStream = socket.getInputStream();
state = initialState;
startReadThread();
} catch (IOException io) {
io.printStackTrace();
}
}
private void startReadThread() {
Thread readRunnable = new Thread() {
public void run() {
while (isLive) {
try {
int num = inStream.read(readBuffer);
if (num > 0) {
byte[] tempArray = new byte[num];
System.arraycopy(readBuffer, 0, tempArray, 0, num);
processBytes(tempArray);
}
sleep(100);
} catch (SocketException s) {
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException i) {
i.printStackTrace();
}
}
}
};
Thread readThread = new Thread(readRunnable);
readThread.start();
}
private void processBytes(byte[] buff) throws InterruptedException {
if (state == fileReceiveState || state == fileContentWaitState) {
//write to file
if (state == fileContentWaitState)
state = fileReceiveState;
fileSize = fileSize - buff.length;
writeToFile(buff);
if (fileSize == 0) {
state = fileReceivedState;
try {
foStream.close();
} catch (IOException io) {
io.printStackTrace();
}
System.out.println("Received " + dstFile.getName());
sendResponse(fileReceived);
fileCount--;
if (fileCount != 0) {
state = fileHeaderWaitState;
} else {
System.out.println("Finished");
state = finalState;
sendResponse("Thanks");
Thread.sleep(2000);
System.exit(0);
}
System.out.println("Received");
}
} else {
parseToUTF(buff);
}
}
private void parseToUTF(byte[] data) {
try {
String parsedMessage = new String(data, "UTF-8");
System.out.println(parsedMessage);
setResponse(parsedMessage);
} catch (UnsupportedEncodingException u) {
u.printStackTrace();
}
}
private void setResponse(String message) {
if (message.trim().equalsIgnoreCase(request) && state == initialState) {
sendResponse(respServer);
state = dirHeaderWait;
} else if (state == dirHeaderWait) {
if (createDirectory(message)) {
sendResponse(dirResponse);
state = fileHeaderWaitState;
} else {
sendResponse(dirFailedResponse);
System.out.println("Error occurred...Going to exit");
System.exit(0);
}
} else if (state == fileHeaderWaitState) {
createFile(message);
state = fileContentWaitState;
sendResponse(fileHeaderRecvd);
} else if (message.trim().equalsIgnoreCase(dirFailedResponse)) {
System.out.println("Error occurred ....");
System.exit(0);
}
}
private void sendResponse(String resp) {
try {
sendBytes(resp.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
private boolean createDirectory(String dirName) {
boolean status = false;
dir = dirName.substring(dirName.indexOf("$") + 1, dirName.indexOf("#"));
fileCount = Integer.parseInt(dirName.substring(dirName.indexOf("#") + 1, dirName.indexOf("&")));
if (new File(dir).mkdir()) {
status = true;
System.out.println("Successfully created directory " + dirName);
} else if (new File(dir).mkdirs()) {
status = true;
System.out.println("Directories were created " + dirName);
} else if (new File(dir).exists()) {
status = true;
System.out.println("Directory exists" + dirName);
} else {
System.out.println("Could not create directory " + dirName);
status = false;
}
return status;
}
private void createFile(String fileName) {
String file = fileName.substring(fileName.indexOf("&") + 1, fileName.indexOf("#"));
String lengthFile = fileName.substring(fileName.indexOf("#") + 1, fileName.indexOf("*"));
fileSize = Integer.parseInt(lengthFile);
dstFile = new File(dir + "/" + file);
try {
foStream = new FileOutputStream(dstFile);
System.out.println("Starting to receive " + dstFile.getName());
} catch (FileNotFoundException fn) {
fn.printStackTrace();
}
}
private void writeToFile(byte[] buff) {
try {
foStream.write(buff);
} catch (IOException io) {
io.printStackTrace();
}
}
private void sendBytes(byte[] dataBytes) {
synchronized (socket) {
if (ioStream != null) {
try {
ioStream.write(dataBytes);
} catch (IOException io) {
io.printStackTrace();
}
}
}
}
}
ClientMain.java and DirectoryTxr.java are the two classes under client application. ServerMain.java and DirectoryRcr.java are the two classes under Server application.
run the ClientMain.java and ServerMain.java

You can sort an array using Arrays.sort(...)
ie
String[] childFiles = file.list();
Arrays.sort(childFiles);
As I understand it, this will sort the files in natural order, based on the file name.
You can modify this by passing a custom Comparator...
Arrays.sort(childFiles, new Comparator<File>() {...}); // Fill out with your requirements...
Progress monitoring will come down to your requirements. Do you want to see only the overall progress of the number of files, the individual files, a combination of both?
What I've done in the past is pre-iterated the file list, calculated the total number of bytes to be copied and used a ProgressMonitor to display the overall bytes been copied...
Otherwise you will need to supply your own dialog. In either case, you will need use SwingUtilities.invokeLater to update them correctly.
Check out Concurrency in Swing for more details.
Network connectivity is subjective. You could simply send a special "message" to there server and wait for a response, but this only suggests that the message was sent and a recipt was received. It could just as easily fail when you start transfering the file again...

Issue writing to serial port from Java [duplicate]

This question already has answers here:
Closed 13 years ago.
Duplicate of Implementation of Xmodem Protocol in Java
I've got to implement the xmodem protocol to receive a file from a target device. For that, I have to request the file, then for every 128-byte packet received, I have to send an acknowledgment. My problem is when I open an outputstream to request the file, it will write but after that I can't write again to the outputstream. What is the problem I'm not getting?
package writeToPort;
import java.awt.Toolkit;
import java.io.*;
import java.util.*;
import javax.comm.*;
import javax.swing.JOptionPane;
import constants.Constants;
public class Flashwriter implements Runnable, SerialPortEventListener {
Enumeration portList;
CommPortIdentifier portId;
String messageString = "\r\nFLASH\r\n";
SerialPort serialPort;
OutputStream outputStream,outputStream2;
InputStream inputStream;
//Thread readThread;
String one, two;
String test = "ONLINE";
String[] dispArray = new String[1];
int i = 0;
Thread readThread;
byte[] readBufferArray;
int numBytes;
String response;
FileOutputStream out;
final int FLASH = 1, FILENAME = 2;
int number;
File winFile;
public static void main(String[] args) throws IOException {
Flashwriter sm = new Flashwriter();
sm.FlashWriteMethod();
}
public void FlashWriteMethod() throws IOException {
portList = CommPortIdentifier.getPortIdentifiers();
winFile = new File("D:\\testing\\out.FLS");
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals("COM2")) {
// if (portId.getName().equals("/dev/term/a")) {
try {
serialPort = (SerialPort) portId.open("SimpleWriteApp",
1000);
} catch (PortInUseException e) {
}
try {
outputStream = serialPort.getOutputStream();
inputStream = serialPort.getInputStream();
System.out.println(" Input Stream... " + inputStream);
} catch (IOException e) {
System.out.println("IO Exception");
}
try {
serialPort.addEventListener(this);
} catch (TooManyListenersException e) {
System.out.println("Tooo many Listener exception");
}
serialPort.notifyOnDataAvailable(true);
try {
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
serialPort
.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
// serialPort.disableReceiveTimeout();
// outputStream.write(messageString.getBytes());
// sendRequest("/r/n26-02-08.FLS/r/n");
number = FLASH;
sendRequest(number);
} catch (UnsupportedCommOperationException e) {
}
}
}
}
}
public void serialEvent(SerialPortEvent event) {
SerialPort port = (SerialPort) event.getSource();
switch (event.getEventType()) {
case SerialPortEvent.DATA_AVAILABLE:
try {
while (inputStream.available() > 0) {
numBytes = inputStream.available();
readBufferArray = new byte[numBytes];
// int readtheBytes = (int) inputStream.skip(2);
int readBytes = inputStream.read(readBufferArray);
one = new String(readBufferArray);
System.out.println("readBytes " + one);
if (one.indexOf("FLASH_") > -1 & !(one.indexOf("FLASH_F") > -1)) {
System.out.println("got message");
response = "FLASH_OK";
// JOptionPane.showMessageDialog(null,
// "ONLINE",
// "Online Dump",
// JOptionPane.INFORMATION_MESSAGE);
// Toolkit.getDefaultToolkit().beep();
// outputStream.write("\r\nONLINEr\n".getBytes());
// outputStream.flush();
// outputStream.write("/r/n26-02-08.FLS/r/n".getBytes());
number = FILENAME;
sendRequest(number);
}
out = new FileOutputStream(winFile, true);
out.write(readBufferArray);
out.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
readBufferArray = null;
// break;
}
// try {
// int c;
// while((c = inputStream.read()) != -1) {
// out.write(c);
// }
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// // readBufferArray=null;
// break;
// }
// if (inputStream != null)
// try {
// inputStream.close();
// if (port != null) port.close();
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
//
//
readThread = new Thread(this);
readThread.start();
}
public void run() {
try {
System.out.println("In run() function ");
Thread.sleep(1000);
} catch (InterruptedException e) {
System.out.println("Interrupted Exception in run() method");
}
}
public void dispPacket(String packet) {
if (response == "FLASH_OK") {
System.out.println("disppacket " + packet);
} else {
System.out.println("No resust");
}
}
public void sendRequest(int num) {
switch (num) {
case FLASH:
try {
// outputStream = serialPort.getOutputStream();
outputStream.write("AT".getBytes());
// outputStream.write("\r\n26-02-08.FLS\r\n".getBytes());
System.out.println("Flash switch");
// outputStream.close();
outputStream.flush();
} catch (IOException e) {
e.printStackTrace();
}
break;
case FILENAME:
try {
//outputStream =(serialPort.getOutputStream());
outputStream.write("\r\nSUNSHINE\\06-03-09.FLS\r\n".getBytes());
System.out.println("File name");
outputStream.flush();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}

Perhaps the streams are blocking.
Java nio has channels that do not block. Try using one of those.
Here's a sample of reading a file with nio. I'm not sure if the same applies for you or not.
I hope it helps.