ProgressMonitorInputStream problem

[benny rusli]

Hello people,

i can not figure it out how to show the process running with ProgressMonitorInputStream during the zip execution. I have written a GUI with Swing to zip the file and if i click the zip button, a dialog should appear to show me that the process is being done, for instance from 0% - 100%. The second question is, which one is the best to use : JProgressBar,ProgressMonitor,ProgressMonitorInputStream. I know that the bytes should be read and then pass to JProgressBar or the other, but i could not figure it out in two days. The code, that i have written, works but the ProgressMonitorInputStream does not show the 0%-100%. Can some please give me an example how to use the three class (JProgressBar,ProgressMonitor,ProgressMonitorInputStream) correctly ? any help would be appreciated.

This Code just only zip a file :

import javax.swing.*;
import javax.swing.ProgressMonitorInputStream.*;
import java.awt.*;
import java.awt.event.*;
import java.util.zip.*;
import java.io.*;
 
public class ZipGui extends JFrame
{
    private JFileChooser jfc = new JFileChooser();
    private JLabel source_jlabel = new JLabel("File to be zipped :");
    private JLabel destination_jlabel = new JLabel("Destination :");
    private JTextField source_jtextfield = new JTextField("c:\\directory");
    private JTextField destination_jtextfield = new JTextField("c:\\destination+name");
    private JButton source_jbutton = new JButton("Browser");
    private JButton destination_jbutton = new JButton("Browser");
    private JLabel ziporexit_jlabel = new JLabel("Action :");
    private JButton zip_jbutton = new JButton("Zip");
    private JButton exit_jbutton = new JButton("Exit");
    
    public ZipGui(String title)
    {
        super(title);
        Container pane = getContentPane();
        pane.setLayout(new GridLayout(3,3));
        pane.add(source_jlabel);
        pane.add(source_jtextfield);
        pane.add(source_jbutton);
        pane.add(destination_jlabel);
        pane.add(destination_jtextfield);
        pane.add(destination_jbutton);
        pane.add(ziporexit_jlabel);
        pane.add(zip_jbutton);
        pane.add(exit_jbutton);
        source_jbutton.addActionListener(new BrowserActionListener());    
        destination_jbutton.addActionListener(new BrowserActionListener());
        zip_jbutton.addActionListener(new ZipActionListener());
        exit_jbutton.addActionListener
        (
            new ActionListener()
            {
                 public void actionPerformed(ActionEvent ae)
                 {
                      Runtime.getRuntime().exit(0);
                 }    
            }
        );
    }
    
    public class BrowserActionListener implements ActionListener
    {
         public void actionPerformed(ActionEvent ae)
         {
              if(ae.getSource() == source_jbutton)
              {
                  //browser both files and directories
                  jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
                  int state = jfc.showOpenDialog(null);
                  if(state == JFileChooser.APPROVE_OPTION)
                  {
                       source_jtextfield.setText(jfc.getSelectedFile().getPath()); 
                  }
                  else if(state == JFileChooser.CANCEL_OPTION)
                  {
                       return;
                  } 
              }
              else if(ae.getSource() == destination_jbutton)
              {
                  //only browser directory to be zipped
                  jfc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); 
                  int state = jfc.showOpenDialog(null);
                  if(state == JFileChooser.APPROVE_OPTION)
                  {
                       destination_jtextfield.setText(jfc.getSelectedFile().getPath()); 
                  }
                  else if(state == JFileChooser.CANCEL_OPTION)
                  {
                       return;
                  }
              }
         }    
    }
    
    public class ZipActionListener implements ActionListener 
    {
         public void actionPerformed(ActionEvent ae) 
         {
             try
             {
                zip();
             }
             catch(IOException ioe)
             {
                JOptionPane.showMessageDialog(null,ioe.toString());
             }
         } 
    }
    
    public void zip() throws IOException
    {
         byte[] buffer = new byte[1024];
         int pos = 0;
         FileOutputStream fos = new FileOutputStream(new File(destination_jtextfield.getText()));   
         ZipOutputStream zos = new ZipOutputStream(fos);
         File file = new File(source_jtextfield.getText());
         String absolute = file.getAbsolutePath(); 
         String relativ = absolute.substring(absolute.lastIndexOf(File.separator)+1);
         FileInputStream fis = new FileInputStream(file);
         ProgressMonitorInputStream pmis = new ProgressMonitorInputStream(this,"Zip "+relativ,fis); 
         ZipEntry entry = new ZipEntry(relativ);
         zos.setMethod(ZipOutputStream.DEFLATED);
         zos.setLevel(9);
         zos.putNextEntry(entry); 
         while((pos = pmis.read(buffer)) != -1)
         {
             zos.write(buffer,0,pos);
         }
         fis.close();
         zos.close();
         pmis.close();
    }
   
    public static void main(String[] args)
    {
        String LookAndFeel = UIManager.getCrossPlatformLookAndFeelClassName();
        try
        {
            UIManager.setLookAndFeel(LookAndFeel);
        }
        catch(Exception e)
        {
            e.getMessage();
        }
        ZipGui zip = new ZipGui("ZipMaker");
        zip.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        zip.setVisible(true);
        zip.pack();
    }
}

[Joe Ess]

JavaRanch Swing FAQ: JProgress Bar Doesn't Update