How to use Progress Monitors?

Question

how to use Progress Monitors?
in the name of god
hi friends
i have a problem. I am writing a program that read data from a file record by record and store to a database. my problem is here that i want add a progress monitor that when the program is doing its work it appear. I use ProgressMonitorInputStream class but it can not work well. It appear and read file record by record and store in table of database but its progress don’t move and do nothing. I know that I have a tiny problem in use this class. Please guide me.
i put my codes below.
best regards
*////this is an event that invoke my classes*
private void readbtnActionPerformed(java.awt.event.ActionEvent evt) {                                       
        JFileChooser fileChooser = new JFileChooser();
        fileChooser.setCurrentDirectory(fileName);
        //filtering file extension
        FileNameExtensionFilter filter = new FileNameExtensionFilter("Text file", "txt");
        fileChooser.setFileFilter(filter);
        //fileChooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
        int result = fileChooser.showOpenDialog(this);
        if (result == JFileChooser.APPROVE_OPTION) {   //if choose ok button
            fileName = fileChooser.getSelectedFile();
            ReadTextFile readFile = new ReadTextFile(fileName);
            readFile.openFile();
            readFile.readRecord();
            *//readFile.closeFile();       //if  this line enable this message appeare "Scanner closed" .why?*      
            readFile.closeFile();
        } else //if choose cancel button
            result = 0;     //do nothing
*/////this is readFile class and invoke data access class and insert data in my database*
public class ReadTextFile {
    private Scanner input;
    private File fileName;
    private int i = 1;
    DataAccess dal = new DataAccess();                     //new a defined my class
    AcountRecord record = new AcountRecord();
    public ReadTextFile(File n) {       //Constructor
        fileName = new File(String.valueOf(n));
        this.openFile();
    private void setRecord(String val) {
        try {
            record.setId(Integer.parseInt(val.substring(1, 5)));
            record.setTime(Integer.parseInt(val.substring(8, 12)));
            record.setDate(Integer.parseInt(val.substring(15, 21)));
            record.setMode(val.substring(24, 26));
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, "ÇäÊÎÇÈ ÔãÇ äÇÏÑÓÊ ÇÓÊ.","Set Record Method",JOptionPane.ERROR_MESSAGE);
    public void openFile() {
        try {
            input = new Scanner(fileName);
        } catch (FileNotFoundException e) {
            JOptionPane.showMessageDialog(null, "ÇäÊÎÇÈ ÔãÇ äÇÏÑÓÊ ÇÓÊ.","Open File Method",JOptionPane.ERROR_MESSAGE);
    public void readRecord() {
        new Thread() {
            private Component _Main;
            @Override
            public void run() {
                try {
                    input = new Scanner(fileName);
                    InputStream in = new FileInputStream(fileName);
                    ProgressMonitorInputStream pm =
                            new ProgressMonitorInputStream(_Main, "reading the file", in);
                    ProgressMonitor pmo = pm.getProgressMonitor( );
                    pmo.setMaximum( (int) fileName.length());
                    while (/*input.hasNext() &&*/ pm.read() != -1) {
                        setRecord(input.next());
                        dal.Connect();
                        String sql = "INSERT INTO fileinfo(pkey,id,date,time,mode)VALUES(%s,%s,%s,%s,'%s')";
                        sql = String.format(sql, i++, record.getId(), record.getDate(), record.getTime(), record.getMode());
                        dal.doCommand(sql);
                } catch (Exception e) {
                    JOptionPane.showMessageDialog(null, e.getMessage() ," Read Record method.",JOptionPane.ERROR_MESSAGE);
                dal.Disconnect();      
        }.start();
    public void closeFile() {
        input.close();
}Edited by: firethumbs on Mar 26, 2009 12:43 PM

Answer 1

IN THE NAME OF GOD
hi firends
i forget say one thing. if remove while loop content this program will work good. i suppose that the while condition and read file records not similar. because while condition check bytes but in while body read records. is that true?
how can solve this problem?
best regurds