import java.io.*;
import java.util.*;
import gnu.io.*;
import java.sql.*;


public class trying5 implements Runnable, SerialPortEventListener {
static Enumeration portList;
static CommPortIdentifier portId;

SerialPort serialPort;
InputStream inputStream;
Thread readThread;
Connection con;

public static void main(String[] args) {
    portList = CommPortIdentifier.getPortIdentifiers();
    while (portList.hasMoreElements()) {
        portId = (CommPortIdentifier) portList.nextElement();
        if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
             if (portId.getName().equals("COM3")) {
                trying5 reader = new trying5();

            }
        }
    }
}

public trying5()   {


    try {
        serialPort = (SerialPort) portId.open("trying5Application", 2000);
        }
        catch (PortInUseException e)

        {
            System.out.println(e);
        }

    try {
        inputStream = serialPort.getInputStream();
        }
        catch (IOException e)

        {
            System.out.println(e);
        }

    try {
        serialPort.addEventListener(this);
        }
        catch (TooManyListenersException e)

        {
            System.out.println(e);
        }

        serialPort.notifyOnDataAvailable(true);

    try {
        serialPort.setSerialPortParams(9600,
            SerialPort.DATABITS_8,
            SerialPort.STOPBITS_1,
            SerialPort.PARITY_NONE);

        }

    catch (UnsupportedCommOperationException e)
        {
            System.out.println(e);
        }

    readThread = new Thread(this);
    readThread.start();

    }

public void run() {
    try {
        Thread.sleep(20000);
        }
    catch (InterruptedException e)
        {
            System.out.println(e);
        }
}

public void serialEvent(SerialPortEvent event) {
    switch(event.getEventType()) {
        case SerialPortEvent.BI:
        case SerialPortEvent.OE:
        case SerialPortEvent.FE:
        case SerialPortEvent.PE:
        case SerialPortEvent.CD:
        case SerialPortEvent.CTS:
        case SerialPortEvent.DSR:
        case SerialPortEvent.RI:
        case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
        break;

        case SerialPortEvent.DATA_AVAILABLE:

        byte[] readBuffer = new byte[20];



        // print to console

        try {
            while (inputStream.available() > 0) {
                int numBytes = inputStream.read(readBuffer);


            }



            String newtuple = new String(readBuffer);



            usercon newcon = new usercon(con, newtuple);

            System.out.print(newtuple + "n");

        } catch (IOException e)
        {
            System.out.println(e);
        }
        break;
    }
}
}

System.out.print(newtuple + "n");

while (inputStream.available() > 0) {
  int numBytes = inputStream.read(readBuffer);
}

byte[] buf = new byte[12];
int len = is.read(buf,0,buf.length);
if (len != buf.length ) {
    throw new RuntimeException("the stream is closed and i failed to read enough data");
}