Structure for write file in java

// declare JFileChooser

JFileChooser fileChooser = new JFileChooser();

 

// let the user choose the destination file

if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {

    // indicates whether the user still wants to export the settings

    boolean doExport = true;

 

    // indicates whether to override an already existing file

    boolean overrideExistingFile = false;

 

    // get destination file

    File destinationFile = new File(fileChooser.getSelectedFile().getAbsolutePath());

 

    // check if file already exists

    while (doExport && destinationFile.exists() && !overrideExistingFile) {

        // let the user decide whether to override the existing file

        overrideExistingFile = (JOptionPane.showConfirmDialog(this, "Replace file?", "Export Settings", JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION);

 

        // let the user choose another file if the existing file shall not be overridden

        if (!overrideExistingFile) {

            if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {

                // get new destination file

                destinationFile = new File(fileChooser.getSelectedFile().getAbsolutePath());

            } else {

                // seems like the user does not want to export the settings any longer

                doExport = false;

            }

        }

    }

 

    // perform the actual export

    if (doExport) {

        ExportTable(destinationFile);

    }

}

 

 

 

 public void ExportTable(File file)throws Exception
    {
        FileWriter writer = new FileWriter(file);
        BufferedWriter bfw = new BufferedWriter(writer);       
        for(int i = 0 ; i < table.getColumnCount() ; i++)
        {
            bfw.write(table.getColumnName(i)+" ");
        }
        bfw.write("\n");
        for (int i = 0 ; i < table.getRowCount(); i++)
        {
            for(int j = 0 ; j < table.getColumnCount();j++)
            {
                bfw.write((String)(table.getValueAt(i,j))+"\t");
            }
             bfw.write("\n");
        }
        bfw.close();
        writer.close();
    }