gets files/directories size with MB/GB in JTextField

MML.Pro

Hi All,

I created example of gui it's get information about the file and/or directories that chosen by the user via JFilechooser, in JTextField named (File_Size) I used this method in this link that gives the size for files and/or directories with Megabytes but I replaced double with float , When I run I see it's working fine with files, but When I select large directory (about Gigabytes) almost returns 0.0 or number this number 0.00390625, I also tried this methods fileName.getTotalSpace() / 1024 and this method also the same result, see the pic to understand the program

package files_dir.information;import java.io.File;import java.io.IOException;import java.util.Date;import javax.swing.JFileChooser;import javax.swing.JOptionPane;/** * * @author Muhammed_Pro */public class Files_Dir_Information extends javax.swing.JFrame {    /**     * Creates new form Files_information     */    public Files_Dir_Information() {        initComponents();        this.setVisible(true);        this.setResizable(false);    }    /**     * This method is called from within the constructor to initialize the form.     * WARNING: Do NOT modify this code. The content of this method is always     * regenerated by the Form Editor.     */    @SuppressWarnings("unchecked")    // <editor-fold defaultstate="collapsed" desc="Generated Code">                              private void initComponents() {        jPanel1 = new javax.swing.JPanel();        getInformation = new javax.swing.JButton();        jLabel2 = new javax.swing.JLabel();        jLabel3 = new javax.swing.JLabel();        jLabel4 = new javax.swing.JLabel();        jLabel5 = new javax.swing.JLabel();        jLabel6 = new javax.swing.JLabel();        jLabel7 = new javax.swing.JLabel();        jLabel8 = new javax.swing.JLabel();        jLabel9 = new javax.swing.JLabel();        File_path = new javax.swing.JTextField();        Can_write = new javax.swing.JTextField();        Can_read = new javax.swing.JTextField();        Last_modify = new javax.swing.JTextField();        Parent_dir = new javax.swing.JTextField();        File_Size = new javax.swing.JTextField();        Is_file = new javax.swing.JTextField();        Is_directory = new javax.swing.JTextField();        BrowseFiles = new javax.swing.JButton();        Clear = new javax.swing.JButton();        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);        setTitle("Files / Directories Info");        jPanel1.setPreferredSize(new java.awt.Dimension(700, 530));        getInformation.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        getInformation.setText("get information");        getInformation.addActionListener(new java.awt.event.ActionListener() {            public void actionPerformed(java.awt.event.ActionEvent evt) {                getInformationActionPerformed(evt);            }        });        jLabel2.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        jLabel2.setText("File path");        jLabel3.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        jLabel3.setText("Can write");        jLabel4.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        jLabel4.setText("Can read");        jLabel5.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        jLabel5.setText("Last modify");        jLabel6.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        jLabel6.setText("Parent directory");        jLabel7.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        jLabel7.setText("File size");        jLabel8.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        jLabel8.setText("Is file");        jLabel9.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        jLabel9.setText("Is directory");        File_path.setEditable(false);        File_path.setBackground(new java.awt.Color(0, 0, 0));        File_path.setForeground(new java.awt.Color(0, 255, 51));        Can_write.setEditable(false);        Can_write.setBackground(new java.awt.Color(0, 0, 0));        Can_write.setForeground(new java.awt.Color(0, 255, 51));        Can_read.setEditable(false);        Can_read.setBackground(new java.awt.Color(0, 0, 0));        Can_read.setForeground(new java.awt.Color(0, 255, 51));        Last_modify.setEditable(false);        Last_modify.setBackground(new java.awt.Color(0, 0, 0));        Last_modify.setForeground(new java.awt.Color(0, 255, 51));        Parent_dir.setEditable(false);        Parent_dir.setBackground(new java.awt.Color(0, 0, 0));        Parent_dir.setForeground(new java.awt.Color(0, 255, 51));        File_Size.setEditable(false);        File_Size.setBackground(new java.awt.Color(0, 0, 0));        File_Size.setForeground(new java.awt.Color(0, 255, 51));        Is_file.setEditable(false);        Is_file.setBackground(new java.awt.Color(0, 0, 0));        Is_file.setForeground(new java.awt.Color(0, 255, 51));        Is_directory.setEditable(false);        Is_directory.setBackground(new java.awt.Color(0, 0, 0));        Is_directory.setForeground(new java.awt.Color(0, 255, 51));        BrowseFiles.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        BrowseFiles.setText("Browse Files/Dir");        BrowseFiles.addActionListener(new java.awt.event.ActionListener() {            public void actionPerformed(java.awt.event.ActionEvent evt) {                BrowseFilesActionPerformed(evt);            }        });        Clear.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N        Clear.setText("Clear");        Clear.addActionListener(new java.awt.event.ActionListener() {            public void actionPerformed(java.awt.event.ActionEvent evt) {                ClearActionPerformed(evt);            }        });        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);        jPanel1.setLayout(jPanel1Layout);        jPanel1Layout.setHorizontalGroup(            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)            .addGroup(jPanel1Layout.createSequentialGroup()                .addGap(50, 50, 50)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)                    .addGroup(jPanel1Layout.createSequentialGroup()                        .addComponent(jLabel6)                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)                        .addComponent(Parent_dir, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE))                    .addGroup(jPanel1Layout.createSequentialGroup()                        .addComponent(jLabel3)                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)                        .addComponent(Can_write, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE))                    .addGroup(jPanel1Layout.createSequentialGroup()                        .addComponent(jLabel2)                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)                        .addComponent(File_path, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE)                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)                        .addComponent(Clear, javax.swing.GroupLayout.PREFERRED_SIZE, 166, javax.swing.GroupLayout.PREFERRED_SIZE))                    .addGroup(jPanel1Layout.createSequentialGroup()                        .addComponent(BrowseFiles, javax.swing.GroupLayout.PREFERRED_SIZE, 459, javax.swing.GroupLayout.PREFERRED_SIZE)                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)                        .addComponent(getInformation, javax.swing.GroupLayout.PREFERRED_SIZE, 166, javax.swing.GroupLayout.PREFERRED_SIZE))                    .addGroup(jPanel1Layout.createSequentialGroup()                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)                            .addComponent(jLabel5)                            .addComponent(jLabel7)                            .addComponent(jLabel8)                            .addComponent(jLabel9))                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)                            .addComponent(Last_modify, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE)                            .addComponent(File_Size, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE)                            .addComponent(Is_file, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE)                            .addComponent(Is_directory, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE)))                    .addGroup(jPanel1Layout.createSequentialGroup()                        .addComponent(jLabel4)                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)                        .addComponent(Can_read, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE)))                .addContainerGap(19, Short.MAX_VALUE))        );        jPanel1Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jLabel2, jLabel3, jLabel4, jLabel5, jLabel6, jLabel7, jLabel8, jLabel9});        jPanel1Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {Can_read, Can_write, File_Size, File_path, Is_directory, Is_file, Last_modify, Parent_dir});        jPanel1Layout.setVerticalGroup(            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)            .addGroup(jPanel1Layout.createSequentialGroup()                .addGap(35, 35, 35)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                    .addComponent(BrowseFiles)                    .addComponent(getInformation))                .addGap(29, 29, 29)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                    .addComponent(jLabel2)                    .addComponent(File_path, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)                    .addComponent(Clear))                .addGap(27, 27, 27)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                    .addComponent(jLabel3)                    .addComponent(Can_write, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE))                .addGap(27, 27, 27)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                    .addComponent(Can_read, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)                    .addComponent(jLabel4))                .addGap(27, 27, 27)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                    .addComponent(jLabel5)                    .addComponent(Last_modify, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE))                .addGap(27, 27, 27)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                    .addComponent(jLabel6)                    .addComponent(Parent_dir, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE))                .addGap(27, 27, 27)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)                    .addComponent(File_Size, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)                    .addComponent(jLabel7, javax.swing.GroupLayout.Alignment.TRAILING))                .addGap(27, 27, 27)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                    .addComponent(jLabel8)                    .addComponent(Is_file, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE))                .addGap(27, 27, 27)                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)                    .addComponent(jLabel9)                    .addComponent(Is_directory, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE))                .addContainerGap(37, Short.MAX_VALUE))        );        jPanel1Layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {getInformation, jLabel2, jLabel3, jLabel4, jLabel5, jLabel6, jLabel7, jLabel8, jLabel9});        jPanel1Layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {Can_read, Can_write, File_Size, File_path, Is_directory, Is_file, Last_modify, Parent_dir});        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());        getContentPane().setLayout(layout);        layout.setHorizontalGroup(            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)            .addComponent(jPanel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)        );        layout.setVerticalGroup(            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)            .addGroup(layout.createSequentialGroup()                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)                .addGap(0, 0, Short.MAX_VALUE))        );        pack();        setLocationRelativeTo(null);    }// </editor-fold>                            private void getInformationActionPerformed(java.awt.event.ActionEvent evt) {                                                       if (File_path.getText().isEmpty()) {            JOptionPane.showMessageDialog(Parent_dir, "Please Select a Valid File Path", "Error", JOptionPane.ERROR_MESSAGE);        } else {            try {                File fileName = new File(File_path.getText());                File_path.setText(fileName.getAbsolutePath());                Can_write.setText(fileName.canWrite() ? "Yes" : "No");                Can_read.setText(fileName.canRead() ? "Yes" : "No");                Last_modify.setText("" + new Date(fileName.lastModified()));                Parent_dir.setText(fileName.getParent());                if (fileName.exists()) {                    float bytes = fileName.length();                    float kilobytes = (bytes / 1024);                    float megabytes = (kilobytes / 1024);                    File_Size.setText("MegaBytes : " + megabytes);                } else if (fileName.isDirectory()) {                    float bytes = fileName.length();                    float kilobytes = (bytes / 1024f);                    float megabytes = (kilobytes / 1024f);                    File_Size.setText("MegaBytes : " + megabytes);                } else {                    File_Size.setText("File dose not exists");                }                Is_file.setText(fileName.isFile() ? "Yes" : "No");                Is_directory.setText(fileName.isDirectory() ? "Yes" : "No");            } catch (Exception e) {                System.err.println(e.getMessage());            }        }    }                                                  private void BrowseFilesActionPerformed(java.awt.event.ActionEvent evt) {                                                    JFileChooser fc = new JFileChooser();        fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);        int returnFile = fc.showOpenDialog(null);        if (returnFile == JFileChooser.APPROVE_OPTION) {            File file = fc.getSelectedFile();            File_path.setText(file.getAbsolutePath());        }    }                                               private void ClearActionPerformed(java.awt.event.ActionEvent evt) {                                              File_path.setText(null);        Can_write.setText(null);        Can_read.setText(null);        Last_modify.setText(null);        Parent_dir.setText(null);        File_Size.setText(null);        Is_file.setText(null);        Is_directory.setText(null);    }                                         /**     * @param args the command line arguments     */    public static void main(String args[]) {        /* Set the Nimbus look and feel */        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html          */        try {            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {                if ("Nimbus".equals(info.getName())) {                    javax.swing.UIManager.setLookAndFeel(info.getClassName());                    break;                }            }        } catch (ClassNotFoundException ex) {            java.util.logging.Logger.getLogger(Files_Dir_Information.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);        } catch (InstantiationException ex) {            java.util.logging.Logger.getLogger(Files_Dir_Information.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);        } catch (IllegalAccessException ex) {            java.util.logging.Logger.getLogger(Files_Dir_Information.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);        } catch (javax.swing.UnsupportedLookAndFeelException ex) {            java.util.logging.Logger.getLogger(Files_Dir_Information.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);        }        //</editor-fold>        //</editor-fold>        /* Create and display the form */        java.awt.EventQueue.invokeLater(new Runnable() {            public void run() {                new Files_Dir_Information().setVisible(true);            }        });    }    // Variables declaration - do not modify                         private javax.swing.JButton BrowseFiles;    private javax.swing.JTextField Can_read;    private javax.swing.JTextField Can_write;    private javax.swing.JButton Clear;    private javax.swing.JTextField File_Size;    private javax.swing.JTextField File_path;    private javax.swing.JTextField Is_directory;    private javax.swing.JTextField Is_file;    private javax.swing.JTextField Last_modify;    private javax.swing.JTextField Parent_dir;    private javax.swing.JButton getInformation;    private javax.swing.JLabel jLabel2;    private javax.swing.JLabel jLabel3;    private javax.swing.JLabel jLabel4;    private javax.swing.JLabel jLabel5;    private javax.swing.JLabel jLabel6;    private javax.swing.JLabel jLabel7;    private javax.swing.JLabel jLabel8;    private javax.swing.JLabel jLabel9;    private javax.swing.JPanel jPanel1;    // End of variables declaration                   }