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to find the count of text files in a directory..please help..

neha gautam
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Joined: Mar 31, 2009
Posts: 32
i want to find a java code to count the number of text files in a folder and display the names of each of the files in form of radio buttons on screen for user to choose the file he wants to work with

kindly someone if possible help me providing the code for the count..
i also have problem as how to insert this code in applet???
Maneesh Godbole
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Joined: Jul 26, 2007
Posts: 10523
    
    9

Neha,
Welcome to the Ranch.

We do not just hand out ready made solutions here.
Why don't you post what have you got so far and we can help you figure out the rest?

Not applet related. Moving to an appropriate forum.


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Sagar Rohankar
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Joined: Feb 19, 2008
Posts: 2902
    
    1

neha gautam wrote:
i also have problem as how to insert this code in applet???

As far as my knowledge is concerned, you can't do this, because Applets are run by the browser's JRE (Applet Viewer), so they can't access data from local machines (Its dangerous )


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Maneesh Godbole
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Joined: Jul 26, 2007
Posts: 10523
    
    9

Sagar Rohankar wrote:
neha gautam wrote:
i also have problem as how to insert this code in applet???

As far as my knowledge is concerned, you can't do this, because Applets are run by the browser's JRE (Applet Viewer), so they can't access data from local machines (Its dangerous )

That is why we need to "sign" the applets
Maneesh Godbole
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Joined: Jul 26, 2007
Posts: 10523
    
    9

How to sign jars
http://java.sun.com/docs/books/tutorial/deployment/jar/signindex.html
neha gautam
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Joined: Mar 31, 2009
Posts: 32




i have the code for files in a directory where names of files is stored in an array(in java)...
now how do i redirect that array to my applet so that i can create an array of radio buttons equal to
the size of array, of my inital java code(file names array)....... finally my applet shud display each name of file as radio button..
i also have my code for radio buttons but i m findin trouble to combine both of them..
please help...
Sagar Rohankar
Ranch Hand

Joined: Feb 19, 2008
Posts: 2902
    
    1

neha gautam wrote:i have the code for files in a directory where names of files is stored in an array(in java)...
now how do i redirect that array to my applet so that i can create an array of radio buttons equal to
the size of array, of my inital java code(file names array)....... finally my applet shud display each name of file as radio button..
i also have my code for radio buttons but i m findin trouble to combine both of them..


I think, you didn't gave a thought to my post, This is simply impossible to do, you cant redirect(its word from your post) the the array of file names to the HTML page to display radio buttons.

Whats your requirement? what exactly your project ?, Its homework/practice code for Applets ?
Maneesh Godbole
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Joined: Jul 26, 2007
Posts: 10523
    
    9

In pseudo code:
1) In the applet init() ensure the file array is prepared
2) Obtain the file array.
3) Prepare a panel with the appropriate layout.
4) Iterate through the file array
5) For every file, create a JRadioButton and add it to the panel
6) Add the panel to the applet

@Sagar
"how how do i redirect that array to my applet.."
neha gautam
Ranch Hand

Joined: Mar 31, 2009
Posts: 32
Sagar Rohankar wrote:
neha gautam wrote:i have the code for files in a directory where names of files is stored in an array(in java)...
now how do i redirect that array to my applet so that i can create an array of radio buttons equal to
the size of array, of my inital java code(file names array)....... finally my applet shud display each name of file as radio button..
i also have my code for radio buttons but i m findin trouble to combine both of them..


I think, you didn't gave a thought to my post, This is simply impossible to do, you cant redirect(its word from your post) the the array of file names to the HTML page to display radio buttons.

Whats your requirement? what exactly your project ?, Its homework/practice code for Applets ?


my requirement now is to develop a user interface that does the following:
1. its displays the number of files in a directory as radio buttons(text files).
2. allows user to choose from those
3. on the selected file's data i need to do check the numbr of colmns it has, i finally need to plot a graph from the file data
4.text file data is like

0.300, -124.87,
0.362, -127.36,
0.425, -129.30,
0.487, -131.52,
0.549, -133.48,
0.612, -135.43,
0.674, -137.19,
0.736, -138.74,
0.798, -140.21,
0.861, -141.52,
0.923, -142.71,
0.985, -143.86,
1.048, -144.94,
1.110, -146.01,
1.172, -146.87,
1.235, -147.60,
1.297, -148.74,
1.359, -149.45,
1.422, -150.16,
1.484, -151.03,
1.546, -151.56,
1.609, -152.31,
1.671, -152.99,
1.733, -153.76,
1.796, -154.51,
1.858, -155.06,
1.920, -155.84,
1.982, -156.17,
2.045, -156.96,
2.107, -157.54,
2.169, -158.13,
2.232, -158.84,
2.294, -159.37



and i need to finally see if there are only 2 columns then i need to insert another column with all zeros in it.
plot graph wid value of these colmns considering them as frequency and real part of input voltage..

kindly tell me if i have chosen a wrong platform to work on..
or please suggest me , the rite language to work on.. thankin you for all your help
Sagar Rohankar
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Joined: Feb 19, 2008
Posts: 2902
    
    1

Maneesh Godbole wrote:@Sagar
"how how do i redirect that array to my applet.."

This same question I want to ask you, when I read your "pseudo code".

You simply can't have any file system rights when it comes to Applet, Correct me OR I'm missing something very silly ?
Sagar Rohankar
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Joined: Feb 19, 2008
Posts: 2902
    
    1

@Neha
Where this files saved,
Answer,

1. On local machine -> Use Java Swing application
2. On server -> Get JSP/Servlet application
neha gautam
Ranch Hand

Joined: Mar 31, 2009
Posts: 32
Sagar Rohankar wrote:@Neha
Where this files saved,
Answer,

1. On local machine -> Use Java Swing application
2. On server -> Get JSP/Servlet application


thanks sagar

on local machine...then i need to go for swing application..
i dont know much about swings..
can we do this fully in swings..
can GUI be made in swings..

thanks again
Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10523
    
    9

Sagar Rohankar wrote:
...You simply can't have any file system rights when it comes to Applet, Correct me OR I'm missing something very silly ?


Check out the link I posted for signing jars.
Applets by default are not allowed to access the system resources. However if you sign the jars, the user is prompted for permissions. If the user grants the permission, the applet can access the system resources.
Also take a look at http://faq.javaranch.com/java/HowCanAnAppletReadFilesOnTheLocalFileSystem
Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10523
    
    9

neha gautam wrote:
Sagar Rohankar wrote:@Neha
Where this files saved,
Answer,

1. On local machine -> Use Java Swing application
2. On server -> Get JSP/Servlet application


thanks sagar

on local machine...then i need to go for swing application..
i dont know much about swings..
can we do this fully in swings..
can GUI be made in swings..



Recommended reading
http://java.sun.com/docs/books/tutorial/uiswing/
http://faq.javaranch.com/java/SwingIsAProperNoun
Sagar Rohankar
Ranch Hand

Joined: Feb 19, 2008
Posts: 2902
    
    1

Thanks Maneesh, I didn't know much about Applets and about signing them . Now I got it.

@Neha
You need some Java Swing tutorial
http://java.sun.com/docs/books/tutorial/uiswing/

Swing isn't difficult, but you should know who contain who and about layouts things.
Best Luck
neha gautam
Ranch Hand

Joined: Mar 31, 2009
Posts: 32
Sagar Rohankar wrote:Thanks Maneesh, I didn't know much about Applets and about signing them . Now I got it.

@Neha
You need some Java Swing tutorial
http://java.sun.com/docs/books/tutorial/uiswing/

Swing isn't difficult, but you should know who contain who and about layouts things.
Best Luck


thanks to both of you guys
i just gave a look at it, i think i shud be able to manage..
if not... ill get bac to you people...
Sagar Rohankar
Ranch Hand

Joined: Feb 19, 2008
Posts: 2902
    
    1

neha gautam wrote:
if not... ill get bac to you people...

Yep, But be sure about posting it in right forum section

And Don't quote us every time, there is REPLY button below to last post.
neha gautam
Ranch Hand

Joined: Mar 31, 2009
Posts: 32
thanks...
i m a bit new to forums...
 
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