problem in searching

[mridulbirla]

import org.apache.commons.io.FileUtils;

import java.io.File;
import java.util.Collection;
import java.util.Iterator;

import java.awt.*;
import javax.swing.*;


public class JAppletExample extends JApplet {
public void init() {

Container content = getContentPane();
content.setBackground(Color.white);
content.setLayout(new FlowLayout());
content.add(new JButton("Button 1"));
content.add(new JButton("Button 2"));

File root = new File("c:/fl");

try {
String[] extensions = {"c"};
String yahya=new String();
boolean recursive = true;

//
// Finds files within a root directory and optionally its
// subdirectories which match an array of extensions. When the
// extensions is null all files will be returned.
//
// This method will returns matched file as java.io.File
//
Collection files = FileUtils.listFiles(root, extensions, recursive);

for (Iterator iterator = files.iterator(); iterator.hasNext();) {
File file = (File) iterator.next();
content.add(new JButton("Button 3"));
content.add(new JButton(file.getAbsolutePath()));
}
} catch (Exception e) {
e.printStackTrace();
}

}
}


The button 3 is not getting made ie for loop is not getting executed.
If anyone can help, please help.

[Eranga]

Where is the button 3?

Ans please use code tags when you are posting code segments next time.

[Tolls]

This:

Collection files = FileUtils.listFiles(root, extensions, recursive);

is presumably returning an empty collection.

And since FileUtils is not a JDK class I can't say why.

[mridulbirla]

Can you please suggest the solution.

My main aim is to search user directory(ie C:\) for for files with particular extension using a japplet which i then embed it in the html code.

[j2me64]

i just tested your code but instead of a for i used a while loop

Iterator iterator = files.iterator();

while (iterator.hasNext()) {
	System.out.println(iterator.next());
	content.add(new JButton("Button 3"));
}

the result is: if no file is found with the extension c no button 3 is added and shown and if there is one or more files with the extension c one or more buttons 3 are shown.

[mridulbirla]

but still it is not working.
I tried to debug it.
code:

import org.apache.commons.io.FileUtils;

import java.io.File;
import java.util.Collection;
import java.util.Iterator;

import java.awt.*;
import javax.swing.*;

public class JAppletExample extends JApplet {
public void init() {

Container content = getContentPane();
content.setBackground(Color.white);
content.setLayout(new FlowLayout());
content.add(new JButton("Button 1"));
content.add(new JButton("Button 2"));

File root = new File("c:/fl");

try {
String[] extensions = {"c"};
String yahya=new String();
boolean recursive = true;
content.add(new JButton("Button 4"));
Collection files = FileUtils.listFiles(root, extensions, recursive);
content.add(new JButton("Button 5"));
Iterator iterator = files.iterator();

while (iterator.hasNext()) {
System.out.println(iterator.next());
content.add(new JButton("Button 3"));
}

// for (Iterator iterator = files.iterator(); iterator.hasNext();) {
// File file = (File) iterator.next();
// System.out.println("HELLO");
// System.out.println("File = " + file.getAbsolutePath());
// content.add(new JButton("Button 3"));
// yahya=file.getName();
// content.add(new JButton(yahya));

// }
// content.add(new JButton("Button 5"));

} catch (Exception e) {


}

}
}


in this button1,2,4 are only getting printed.
@tolls
if i make this as simple java application without applet. It is working fine

[Tolls]

Log the exception.
You are eating exceptions in your catch block and I'd lay good odds on there being an exception, so printStackTrace().

[mridulbirla]

@toll it is not going in catch block .I tried to add a button in catch block but it is not getting printed.

[DarrylBurke]

My main aim is to search user directory(ie C:\) for for files with particular extension using a japplet

Applets are restricted from accessing the local filesystem, unless signed/trusted.

db

[Tolls]

@toll it is not going in catch block .I tried to add a button in catch block but it is not getting printed.

Add a printStackTrace().
As I suggested.
Adding a button is meaningless.
Never eat Exceptions.

ETA: Then you'd probably get the exception that Darryl is talking about. And save yourself (and us) time trying to figure out what's going on.