File Chooser Dialog box

[sandhya kale]

Hello..


How to open selected file from fileChooser dialog box.???
Is there any method to open a selected file???

[Randall Twede]

final JFileChooser fc = new JFileChooser();
int returnVal = fc.showOpenDialog(window);
if (returnVal == JFileChooser.APPROVE_OPTION)
{
try
{
File file = fc.getSelectedFile();
.
.
.
catch (IOException ex)

[Michael Dunn]

> How to open selected file from fileChooser dialog box.???

open how - if the selected file is abc.doc - open in word? or abc.xls - open in excel etc.
or do you just want the file contents read into java?

[sandhya kale]

Michael Dunn wrote:> How to open selected file from fileChooser dialog box.???

open how - if the selected file is abc.doc - open in word? or abc.xls - open in excel etc.
or do you just want the file contents read into java?

No i don't want to read file contents..

I am developing one Application,in which a user can open any file of his interest by clicking on 'Browse' button...
I have designed code up to Browse and i got Browse window too after clicking on Browse button.
but it did not open a required file..If any one know please do inform.

[sandhya kale]

Yaa I tried the same code as...


public class FileChooser {
public FileChooser(){
//JFileChooser file = null;
final JFileChooser fc = new JFileChooser();
try{
int openChoice = fc.showOpenDialog(window);
StringBuffer tracker = null;
if (openChoice == JFileChooser.APPROVE_OPTION){
//Put open file code in here
File openFile = fc.getSelectedFile();

//tracker.append("\nThe file selected is " + openFile.getName());
tracker.append("\nThe file's path is " + openFile.getPath());
tracker.append("hi");
System.out.println(tracker.toString());
JOptionPane.showMessageDialog(new javax.swing.JFrame(), tracker.toString());
}
}catch(Exception e){
javax.swing.JOptionPane.showMessageDialog(new JFrame(), e.getMessage());
}
}
}
Firstly i give 'null' as a parameter to showOpenDialog() method but it did not work,
got 1 error when tried this line as..

int openChoice = fc.showOpenDialog(window);
what does 'window' parameter mean??

[Cole Terry]

sandhya kale wrote:

Michael Dunn wrote:
but it did not open a required file..If any one know please do inform.

Who knows? Without posting your own code and exception/error stack trace, it's impossible to see where you are going wrong with.

[Rob Camick]

See: How to Integrate With the Desktop Class.

[Randall Twede]

the window parameter is a reference to the JFrame that created the FileChooser

ill post some longer code for you. it opens image files but it will be similar with other file types.

/*
 * ImageViewer.java
 * Program for displaying image files
 * Created 12/2011
 */

/**
 *
 * Randall Twede
 */
import java.awt.Dimension;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.Container;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
import java.io.File;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;

public class ImageViewer
{
    private JFrame window;
    private JLabel displayArea;

    /** Creates a new instance of ImageViewer */
    public ImageViewer()
    {
	window = new JFrame();
	displayArea = new JLabel();
	window.setSize(200, 200);
        center();
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setTitle("ImageViewer");
        Container c = window.getContentPane();
	JMenuItem openMenuItem = new JMenuItem( "Open" );
	OpenListener open = new OpenListener();
        openMenuItem.addActionListener(open);
	JMenu fileMenu = new JMenu( "File" );
        fileMenu.add( openMenuItem );
	JMenuBar menuBar = new JMenuBar();
        menuBar.add( fileMenu );
        window.setJMenuBar(menuBar);
	JScrollPane scrollPane = new JScrollPane(displayArea);
	c.add(scrollPane);
        window.setVisible(true);
    }

    // centers a JFrame
    private void center()
    {
        window.setLocationRelativeTo(null);   
    }

    private void displayImage(BufferedImage image)
    {
	ImageIcon icon = new ImageIcon(image);  
	displayArea.setIcon( icon );
	window.pack();
	Dimension frameSize = window.getSize();  
	GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();  
	Rectangle screenBounds = env.getMaximumWindowBounds();  
  
	if (frameSize.width > screenBounds.width)  
	    frameSize.width = screenBounds.width;  
  
	if (frameSize.height > screenBounds.height)  
	    frameSize.height = screenBounds.height;  
  
	window.setSize( frameSize );
	center();
    }

  class OpenListener implements ActionListener
  {

    public void actionPerformed(ActionEvent e)
    {
	final JFileChooser fc = new JFileChooser();
        int returnVal = fc.showOpenDialog(window);
        if (returnVal == JFileChooser.APPROVE_OPTION)
        {
            try
            {
                File file = fc.getSelectedFile();  
                BufferedImage image = ImageIO.read(file);
                if(image != null)
		{
		    displayImage(image);
		}
		else
		{
                    String message = "This program can only open image files, like gif or jpg";
                    JOptionPane.showMessageDialog( window, message, "Error",JOptionPane.ERROR_MESSAGE );
		}
            }
            catch (IOException ex)
            {
		String message = "could not open file";
		JOptionPane.showMessageDialog( window, message, "IOException",JOptionPane.ERROR_MESSAGE );          
	    }
        }
    }
  }

    // create and display an instance of ImageViewer
    public static void main(String args[])
    {  
        SwingUtilities.invokeLater(new Runnable()
	{  
            public void run()
	    {  
        	new ImageViewer();  
      	    }  
   	});
    }
}

[sandhya kale]

Thank You...Randall Twede..
Now i'll try for other file types..

[sandhya kale]

This Browsing URLs and Opening Files helped me...
Thank You Rob Camick.... for suggesting Desktop API..

[sandhya kale]

Finally got what i was looking for
here is the code that can easily opens any file from Browse button...

/*
*Desktop class only can get when you use JDK 6
*/
import java.awt.Desktop;

import javax.swing.JFileChooser;

import java.io.File;

public class OpenFileUsingJFileChooser
{
public static void main(String[]args)
{
 //Create a file chooser
 JFileChooser fileChooser=new JFileChooser();

 //File chooser will appear in no windows parent
 int a=fileChooser.showOpenDialog(null);

 //Action that will take when user click open button
 if(a==JFileChooser.APPROVE_OPTION)
 {
  //Get file that want to open
  File fileToOpen=fileChooser.getSelectedFile();

  try
  {
   //Open file using suitable program on computer.
   //You don't need to tell what program to use.
   //Java will select default program that your
   //computer use to open the file.
   //In windowsXP you can see what
   //program that your computer use to open
   //a file by right click on file,
   //choose properties and see at
   //Opens with : ProgramNameToOpenTheFile
   Desktop.getDesktop().open(fileToOpen);
  }
  catch(Exception exception)
  {
   System.out.println("Problem occour when to open the file");
  }
 }
}
}

[Randall Twede]

thanks Rob for pointing it out and to Sandhya for demonstrating. im still stuck in java2 land

[sandhya kale]

Really...Thanks a lot Rob.