I need help in drowng two varibles in real time chart(LiveGraph)

Question

hi every one
in my application i have two variables 1)patient id 2) time . that i need to draw in a realtime chart
i found a program called LiveGraph. i don't know if there is easier way for drawing charts??
here i code:
// derived from SUN's examples in the javax.comm package
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Enumeration;
import java.util.TooManyListenersException;
import java.lang.*;
import oracle.jdbc.driver.*;
import gnu.io.*; // for rxtxSerial library
public class nulltest22 implements SerialPortEventListener {
static CommPortIdentifier portId;
static CommPortIdentifier saveportId;
static Enumeration portList;
InputStream inputStream;
SerialPort serialPort;
Thread readThread;
static Connection con = null;     
static String messageString = "Hello, world!";
static OutputStream outputStream;
static boolean outputBufferEmptyFlag = false;
public static void main(String[] args)throws SQLException {
boolean portFound = false;
String defaultPort;
// determine the name of the serial port on several operating systems
String osname = System.getProperty("os.name","").toLowerCase();
if ( osname.startsWith("windows") ) {
// windows
defaultPort = "COM5";
else {
System.out.println("Sorry, your operating system is not supported");
return;
if (args.length > 0) {
defaultPort = args[0];
System.out.println("Set default port to "+defaultPort);
          // parse ports and if the default port is found, initialized the reader
try {
portId = (CommPortIdentifier)CommPortIdentifier.getPortIdentifier(defaultPort);
System.out.println("Found port: "+defaultPort);
portFound = true;
          nulltest22 reader = new nulltest22();
catch (Exception e) {
     System.out.println(e);
          if (!portFound)
               System.out.println("port " + defaultPort + " not found.");
          // close the connection
               //con.close();
     } //main end
public nulltest22 () {
     try
     try
                         DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
                    Class.forName("oracle.jdbc.driver.OracleDriver");
                    catch (ClassNotFoundException s)
                         System.out.println(s);
                    con =DriverManager.getConnection("jdbc:oracle:thin:@toshiba:1521:ora","scott","tiger");
          catch(SQLException s)
               System.out.println(s);     
// initalize serial port
try {
serialPort = (SerialPort) portId.open("SimpleReadApp", 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);
// activate the DATA_AVAILABLE notifier
serialPort.notifyOnDataAvailable(true);
try {
// set port parameters
serialPort.setSerialPortParams(19200, SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {}
}//end constructor
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:
// we get here if data has been received
byte[] readBuffer = new byte[400];
try {
// read data
while (inputStream.available() > 0) {
int numBytes = inputStream.read(readBuffer);
// print data
String result = new String(readBuffer);
//checks in the incoming packet is patients info
int a = result.indexOf("77707373");
System.out.println("find wpss in index "+ a);
if (a!=-1){
int location=a;
char array[] = result.toCharArray();
//save pitent info.
String PID = new String (array,location+8,2);
String TS = new String (array,location+10, 8);
String sample = new String (array,location+18, 4);
String HeartBeat = new String (array,location+22, 4);
try {
     Statement st = con.createStatement();
     String statment = "INSERT INTO heartbeat5 VALUES('" + PID+ "' , '" + TS + "' , '" + sample + "', ' " + HeartBeat + "') ";
     System.out.println(statment);
     int val= st.executeUpdate(statment);
          } catch (SQLException ex){ }
} catch (IOException e) {}
break;
i need to drow PID and TS in the code

Answer 1

You might consider JFreeChart. There are multiple introductory articles on JFreeChart such as [Visualize Your Oracle Database Data with JFreeChart|http://www.oracle.com/technology/pub/articles/marx-jchart.html] and [On a New Course with JFreeChart|http://www.javaworld.com/javaworld/jw-12-2002/jw-1227-opensourceprofile.html]. The JFreeChart site lists [open source alternatives|http://www.jfree.org/jfreechart/faq.html#FAQ13] to JFreeChart.