Component not working at Mac M/C

[Shalini Chandel]

Hi all,

I made a component using Swing for file upload thru drag and drop. Its working perfectly OK with IE browser in Windows platform but its not working in Macintosh. Any idea whats wrong with it?

thanx & regards,
Shalini

[Stuart Gray]

Not until you post some code or the exact error messages you are getting. What browser are you using on the Mac? Have you tried alternative browsers on Windows to see if it really is an OS issue?

[Shalini Chandel]

On MAC the Browser is safari 2.0 and JRE version 1.4.2

The entire code is below:

  
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
 
class NewUploadDemo extends JPanel
{
JPanel upperPanel, lowerPanel;
 
NewUploadDemo()
{
super(new BorderLayout());
 
JLabel label=new JLabel(new ImageIcon("zone1.jpg"));
label.setTransferHandler(new MyFileTransferHandler());

JPanel fcPanel = new JPanel(new BorderLayout());
        fcPanel.add(label, BorderLayout.CENTER);
 
JButton clear = new JButton("Clear All");
        JPanel buttonPanel = new JPanel(new BorderLayout());
        buttonPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
        buttonPanel.add(clear, BorderLayout.LINE_END);
 
        JPanel upperPanel = new JPanel(new BorderLayout());
        upperPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
        upperPanel.add(fcPanel, BorderLayout.CENTER);
        upperPanel.add(buttonPanel, BorderLayout.PAGE_END);
add(upperPanel);
}
}
 
public class MyApplet extends JApplet
{
public void init()
{
getContentPane().add(new NewUploadDemo());
}
};
 
class MyFileTransferHandler extends TransferHandler
{
 
  private DataFlavor flavor;
      private boolean shouldRemove;
  protected String newline = "\n";
  Position p0 = null, p1 = null;
  private JTextArea source;
 
public boolean canImport(JComponent c, DataFlavor[] flavors) {
        if (hasFileFlavor(flavors))   { return true; }
        if (hasStringFlavor(flavors)) { return true; }
        return false;
    }
 

private boolean hasFileFlavor(DataFlavor[] flavors) {
        for (int i = 0; i < flavors.length; i++) 
{
flavor=flavors[i];
            
if (flavor.equals(DataFlavor.javaFileListFlavor)) 
{
System.out.println("canImport: JavaFileList FLAVOR: " + flavor);
return true;
}
        }
        return false;
    }
 
    private boolean hasStringFlavor(DataFlavor[] flavors) {
        for (int i = 0; i < flavors.length; i++) {
flavor=flavors[i];
            if (flavor.equals(DataFlavor.stringFlavor)) {
System.out.println("canImport: String FLAVOR: " + flavor);
                return true;
            }
        }
        return false;
    }
 
public boolean importData(JComponent c, Transferable t) 
{
        JTextArea tc=new JTextArea();
 
        if (!canImport(c, t.getTransferDataFlavors())) 
{
            return false;
        }
        
        try 
{
            if (hasFileFlavor(t.getTransferDataFlavors())) 
{
                String str = null;
                java.util.List files = (java.util.List)t.getTransferData(flavor);
 
                for (int i = 0; i < files.size(); i++) 
{
                    File file = (File)files.get(i);
 
System.out.println("GOT FILE: "  + file.getCanonicalPath());
 
                      BufferedReader in = null;
 
                    try 
{
                        in = new BufferedReader(new FileReader(file));
 
                        while ((str = in.readLine()) != null) 
{
                            tc.append(str + newline);
System.out.println(str + newline);
                        }
                    } 
catch (IOException ioe) 
{
                        System.out.println("importData: Unable to read from file " +file.toString());
                    } 
finally 
{
                        if (in != null) 
{
                            try 
{
                                in.close();
                            } 
catch (IOException ioe) 
{
                                 System.out.println("importData: Unable to close file " +file.toString());
                            }
                        }
                    }
                }
                return true;
            } 
else if (hasStringFlavor(t.getTransferDataFlavors())) 
{
                tc = (JTextArea)c;
                if (tc.equals(source) && (tc.getCaretPosition() >= p0.getOffset()) &&(tc.getCaretPosition() <= p1.getOffset())) 
{
                    shouldRemove = false;
                    return true;
                }
                String str = (String)t.getTransferData(flavor);
                tc.replaceSelection(str);
                return true;
            }
        } 
catch (UnsupportedFlavorException ufe) 
{
            System.out.println("importData: unsupported data flavor");
        } 
catch (IOException ieo) 
{
            System.out.println("importData: I/O exception");
        }
        return false;
    }
};

[Stuart Gray]

But again: 'not working' how? Does the applet load? Does it run and then crash? What happens? Even if you see no error message, it is more helpful to to us this than to just say 'it doesn't work'.

[Shalini Chandel]

Actually this applet is running perfectly when we execute/load it individually i.e. without any web application. But when i try to execute the applet eith web application, it's not executing in any browser in windows or mac..
Otherwise rest all the applet is working perfectly OK with windows as well as mac browsers..
With this applet,,its showing "Class Not Found" Error...
Any inputs???

regards,
Shalini