Cannot find symbol and streams

Question

I am making some progress with implimenting the icaste jar file to control the serial port. My code is below. I have a problem with the statement osOut.write(bData,0,0); at the bottom of the code. cannot find symbol
I am trying to write one byte to the serial port, I don't understand the use of the outputStream being used here from java.io , If I knew how the access worked on a lower level perhaps I could figure it out.
In an AVR microcontroller for example, you set up the hardware on the chip to output a byte you place in a buffer, when there is data to read you have an interrupt set to jump to an isr routine that receives a byte and puts it in your own memory space or array. The hardware has a buffer it uses to hold some number of bytes and error flags to find out if you have a buffer overrun.
Not sure if that concept is what is going on here or not.
import com.icaste.JCommSerial.*;
import java.io.*;
public class newtest {
     * @param args
    public static void main(String[] args) {
        byte[] baData = new byte[1];
        baData[0]= (byte)255;
        String Errorstring = "None";
        System.out.println("Testing Serial port");
        SerialPort myPort = new SerialPort();
        try {
            myPort.openPort("COM1:", 2000, 2000);
        } catch(SerialPortNotFoundException e) {
            Errorstring="Serial port not Found";
        } catch(SerialPortInUseException e) {
            Errorstring="Serial port in use";
        } catch(SerialPortException e) {
            Errorstring="Serial port unable to complete operation";
        } catch(Throwable e) {
            Errorstring="unknown error";
        try {
            myPort.setBaudRate(9600);
        } catch(SerialPortException e) {
            Errorstring="Unable to set baud rate";
        try {
            myPort.setDataBits((byte)8);
        } catch(SerialPortException e) {
            Errorstring="Unable to set data bits";
        try {
            myPort.setStopBits(SerialPort.ONESTOPBIT);
        } catch(SerialPortException e) {
            Errorstring="Unable to set stop bit";
        try {
            myPort.setParityMode(SerialPort.NOPARITY);
        } catch(SerialPortException e) {
            Errorstring="Unable to set parity";
        try {
            OutputStream osOut = myPort.getOutputStream();
        } catch(IOException e) {
        try {
            osOut.write(baData, 0, 0);
        } catch(IOException e) {
            Errorstring="write byte failed";
        System.out.println("Error = "+Errorstring);
   

Answer 1

Ok, I can finally put this question to bed. My main error was not knowing what the line of code actually was. After 4 hours of reading http://www.yu.edu/faculty/arosnfld/java/javanotes-3.1/c5/s3.html and a nice email from the tech at icaste, I finally understand what is going on and what it all means.
If you would like to see what I am up too you can check out the DMX light prototype moveie I made a few weeka ago. It is using a program called freescale and a DMX controller connected to a USB port. The serial port can be configured to operate a USB port from windows point of view and that is my next quest to study how a USB port connection works on the hardware side.
Thanks for the help and links, I wish there was more time in the day, and night to cram all this stuff in my head.
Quicktime Movie (kind of big) http://www.acousticlights.com/ledmovie.m1v
import com.icaste.JCommSerial.*;
import java.io.*;
public class newtest {
     * @param args
    public static void main(String[] args) {
        SerialPort myPort = new SerialPort();
        String Errorstring = "None";
        System.out.println("Testing Serial port ");
        try {
            myPort.openPort("COM1:", 2000, 2000);
        } catch(SerialPortNotFoundException e) {
            Errorstring="Serial port not Found";
        } catch(SerialPortInUseException e) {
            Errorstring="Serial port in use";
        } catch(SerialPortException e) {
            Errorstring="Serial port unable to complete operation";
        } catch(Throwable e) {
            Errorstring="unknown error";
        try {
            myPort.setBaudRate(9600);
        } catch(SerialPortException e) {
            Errorstring="Unable to set baud rate";
        try {
            myPort.setDataBits((byte)8);
        } catch(SerialPortException e) {
            Errorstring="Unable to set data bits";
        try {
            myPort.setStopBits(SerialPort.ONESTOPBIT);
        } catch(SerialPortException e) {
            Errorstring="Unable to set stop bit";
        try {
            myPort.setParityMode(SerialPort.NOPARITY);
        } catch(SerialPortException e) {
            Errorstring="Unable to set parity";
        try {
//Get an OutputStream from JCommSerial and reference it by the name osOut.
//assuming you already created a JCommSerial object called spPort
// and opened it!
            OutputStream osOut = myPort.getOutputStream();
//Write your byte to the port
// the write() function takes an int that is then converted
// to a byte for transmission.
            int iData = 255;
// Send 254 bytes of data to the serial port
            while (iData >0) {
                osOut.write(iData);
                iData--;             
        } catch(Exception e){
            System.out.println(e.toString());
        System.out.println("Error = "+Errorstring);
}