Work with Files in Java

Hello!
Can anyone help me. How can I API in Java Technology for files to find ?

don't uite understand your question.
here's the location of java API for File class, for working with File and Directory..
http://java.sun.com/j2se/1.3/docs/api/java/io/File.html
for reading and writing..you may want to look at th eio package for classes such as
Reader, FileReader, BufferedReader, Writer, FileWriter, BufferedWriter
here's java API
http://java.sun.com/j2se/1.4.2/docs/api/

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Working with Files in Java

From my local machine I am running a Java code which fetches values from DB and writes it into a TXT file and save the TXT file into a different server say 'A'. This part is working fine if I run the Java code from my local machine.
I tried deploying the same Java code into a differnet server say 'B' and executed it, but it failed. The code is trying to save the TXT file into a unknown path which is not specified in the code rather than saving in the server 'A'.
Please note, Server 'B' is having write access on server 'A' and I have given the absolute path of server 'A' in code.
Can someone tell me why it is trying to save the TXT file to a path which is not specified in code?
I am getting the following error message :
java.io.FileNotFoundException: \\...\...\...(unknown path)
(Access is denied)
Plz assist.

VishnuCBE wrote:
it is a standalone application and not web based. Servers A and B, you can imagine them as machines connected on network. So in code i am giving the server's absolute path where the file needs to be stored.Please see reply #1. Even if two machines are on a network, it doesn't mean that files can be automagically copied between them. There has to be some way for the file to move through the network across machines. And it's pretty much impossible to tell what's going wrong without some details.
As i said earlier my problem is, the code is trying to save the txt file in an unknown path which is not mentioned in the code.And a stack trace would help diagnose that.

How to work with file system in linux within a JSF app?

I use this line in my backing bean to log some events:
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You should never use relative paths to access the filesystem. The path would be relative to the current working directory which is not per se the same in all environments. To convert a relative web path to an absolute file system path, you need ServletContext#getRealPath(). Use this absolute file system path in the java.io stuff. In a JSF application on top of Servlet API you can get the underlying ServletContext by ExternalContext#getContext().
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Managing spaces when working with files

Hi, how can I work with files on windows on paths thats have blank spaces like "Documents and Settings", I used getResource().getFile() and writting the path but it always fails!
The FileOutputStream always thorws the exception FIleNotFoundException.
I tried the path with blank spaces and tried with %20 but always is the same.

Are you saying that OutputStream os = new FileOutputStream("C:/Documents
and
Settings/AAD/workspace/MobileServer/bin/Configuracion/
conexiones.omt");throws an exception? If so, what exception?Exactly it throws an Exception.
java.io.FileNotFoundException: C:\Documents and Settings\AAD\workspace\MobileServer\bin\server\Configuracion\conexiones.omt (El sistema no puede hallar la ruta especificada)
     at java.io.FileOutputStream.open(Native Method)
     at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
     at java.io.FileOutputStream.<init>(FileOutputStream.java:70)
     at server.tcp.GestionTCP.guardar(GestionTCP.java:118)
     at server.tcp.GestionTCP.mouseReleased(GestionTCP.java:89)
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     at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
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Will weblogic 4.5 work with the Sun Java Servlet Development Kit Version 2.1?

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WL 4.5 supports JSP 1.0 (and, therefore Servlet 2.1).
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          Cox News <[email protected]> wrote in message
          news:7rk40p$s00$[email protected]..
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          > Will weblogic 4.5 work with the Sun Java Servlet Development Kit Version
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I worked with files in LR that were originally on my C drive, then were moved to an external HD for storage. I now want to do some more work on those files (which have the same file name as on the C drive). I plugged the drive into my computer and it show

I worked with files in LR that were originally on my C drive, then were moved to an external HD for storage. I now want to do some more work on those files (which have the same file name as on the C drive). I plugged the drive into my computer and it shows in LR under folders as the F drive and the little green light is on, but LR is showing only the first 6 files and not the remaining 200 or so. How do I expand the F folder to expose all files?

I worked with files in LR that were originally on my C drive, then were moved to an external HD for storage. I now want to do some more work on those files (which have the same file name as on the C drive). I plugged the drive into my computer and it shows in LR under folders as the F drive and the little green light is on, but LR is showing only the first 6 files and not the remaining 200 or so. How do I expand the F folder to expose all files?

How to work with files in folders on Application/Presentation Server

Hi,
I am working on interface program in which files are populated in folders in application/presentation server in the format 'ABCsy-datumsy-uzeit.txt'(e.g.ABC20051022161450.txt,ABC20051022161455.txt ) in directory c:\temp.
I want to sort all these files and read in sorted manner.
can anybody help me out in this.
waiting for reply.
thanks & regards,
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Hi,
This logic will work for files on presentation server,
DATA: l_count TYPE i,
       l_filename TYPE string,
       t_files TYPE string OCCURS 0 WITH HEADER LINE,
       BEGIN OF t_files_sorted OCCURS 0,
         file_prefix(3),
         file_date LIKE sy-datum,
         file_time LIKE sy-uzeit,
         file_extension(4),
       END OF t_files_sorted,
       t_text TYPE TABLE OF w3html.
CALL METHOD cl_gui_frontend_services=>directory_list_files
EXPORTING
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    FILTER                      = '*.txt'
     files_only                  = 'X'
   DIRECTORIES_ONLY            =
CHANGING
    file_table                  = t_files[]
    count                       = l_count
EXCEPTIONS
    cntl_error                  = 1
    directory_list_files_failed = 2
    wrong_parameter             = 3
    error_no_gui                = 4
    OTHERS                      = 5.
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
LOOP AT t_files.
t_files_sorted = t_files.
APPEND t_files_sorted.
ENDLOOP.
SORT t_files_sorted BY file_date file_time.
LOOP AT t_files_sorted.
CONCATENATE 'C:\Temp\' t_files_sorted INTO l_filename.
CALL METHOD cl_gui_frontend_services=>gui_upload
    EXPORTING
      filename                = l_filename
     FILETYPE                = 'ASC'
     HAS_FIELD_SEPARATOR     = SPACE
     HEADER_LENGTH           = 0
   IMPORTING
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     HEADER                  =
    changing
      data_tab                = t_text[]
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      FILE_READ_ERROR         = 2
      NO_BATCH                = 3
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      NO_AUTHORITY            = 6
      UNKNOWN_ERROR           = 7
      BAD_DATA_FORMAT         = 8
      HEADER_NOT_ALLOWED      = 9
      SEPARATOR_NOT_ALLOWED   = 10
      HEADER_TOO_LONG         = 11
      UNKNOWN_DP_ERROR        = 12
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      DP_OUT_OF_MEMORY        = 14
      DISK_FULL               = 15
      DP_TIMEOUT              = 16
      others                  = 17.
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
             WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
*****Your processing here..
ENDLOOP.
Also, use the FM that MAX has if you have to work with files on application server by replacing code in the above logic at appropriate places, like replace
cl_gui_frontend_services=>directory_list_files
with the corresponding fm
and replace cl_gui_frontend_services=>gui_upload
with OPEN DATASET...
     CLOSE DATASET...
logic.
Hope this helps..
Sri
Message was edited by: Srikanth Pinnamaneni

Cannot print "working with files and folders htm

When I try to print "Working with files-and-folders" from a Google search, it only prints part of it. I have changed my destination folder to no avail. Thank you or any help, Jack Menendez

What's the best method for moving all my nonsystem related stuff over to this new driveIan has provided you with the best solution, SuperDuper.
But if you have a 250 GB external, you really ought to clone your entire system,(only about 3 GB) so you have a backup.
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That's my 2 cents anyway
-mj
[email protected]

Does anyone have SSL working with the Sun Java System App Server PE?

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THANK YOU!

once apon a time i had a real problem with the same issue.. best of luck.. i forget now how to fix.. sorry.

Will the current plugins for Sigma DP1/2 RAW files work with files from the DP1/2 Merrill cameras? A

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Not sure what plugins you mean, Hornet - Lr doesn't rely on plugins to read new cameras.
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Hopefully someone with a Merrill will be able to chime in about whether its files work with the current Lr.

Freeze up after working with files copied to DVD. A105-4274 Satillite

When working with files copied to a DVD, when ejecting my computer locks up. Have to turn it off manually and restart.
Can use anyother type of DVD, and this does not happen. Only useing DVD with files written to it. This only happens when i work with the files and then eject the DVD. Please I need help
Solved!
Go to Solution.

ebonykaneezer wrote:
When working with files copied to a DVD, when ejecting my computer locks up. Have to turn it off manually and restart.
Can use anyother type of DVD, and this does not happen. Only useing DVD with files written to it. This only happens when i work with the files and then eject the DVD. Please I need help
I'm guessing that you are just pressing the eject button on the drive. Don't do that.
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How to work with xml in java ?

Hello everybody. I am trying to read, write and modify xml file in java. But i don't know what is the best method for work with xml file ? Please give me some examples for read, write and modify it.
Thanks in advance.

>
Hello everybody. I am trying to read, write and modify xml file in java. But i don't know what is the best method for work with xml file ?>'It depends'. I saw some discussions of XML parsing using different J2SE core XML APIs (the J2SE has a selection of ways to deal with XML) where one API was 20 times faster than the other.
>
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>
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Applet showDocument work with file protocol?

Hi,
I have a signed applet (using signtool and Thawte certification) with full permission. Now I want to display a local text file from the browser. So here is the code I am using:
try
//test file protocol
applet.getAppletContext().showDocument(new URL("file:///c:/test.txt"),"_blank");
//test http protocol
applet.getAppletContext().showDocument(new URL("http://java.sun.com"),"_blank");
catch(Exception e)
e.printStackTrace();
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Does anyone know why showDocument does not work for file protocol? Have anyone solve this problem?
Thanks a lot!

Try this:
try
//test file protocol
applet.getAppletContext().showDocument(new URL("file:\\\\c:\\test.txt"),"_blank");
//test http protocol
applet.getAppletContext().showDocument(new URL("http://java.sun.com"),"_blank");
catch(Exception e)
e.printStackTrace();
It works for me...

Help working with File() objects

Hi,i'm sorry for my not-so-perfect English.
I'm working with java.io.File object, to use and know the contents of a folder.
But if i try to use the function list() on a folder that is the first in my hard drive (For example: C:\Test on windows, or /usr on unix), and try to get the Parent...i receive null.
This is a regoular way,in my opinion; But i have a problem: i'm working at a Java File Manager, and i'd like to LIST all my hard driver present in my computer (ie. C:,D:, E:) but i don't really know how to do...!!
On UNIX, i can resolve this problem using a list() on /mnt folder, for mounted drive...but on Windows...how can i!?
Thanks for the answers...

Hi,
Take a look at:
File.listRoots()
Kaj

Help with Files in Java

I need to replace some content in a file . Can some one tell me if we can append or replace only a part of the content in files using Java?
Right now I am using Stringtokenizer, break the file into tokens and put them in a buffer, append the required data and then write to a file. But this seems very crude way of doing it and the output is not as I wanted it.
Please help,
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"Random" updates to files are possible, but the problem lies when part of a file changes size, with the need to move the rest of it up or down. In general, when part of the file might change size, it's a lot easier all round to create a new version of the file and rename.

Work with Files in Java

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