Extracting certain files from a jar

I am creating a jar that when d-clicked on will extract its files to the computer the jar resides on. Here is my question: how do I get it to only extract certain files(ie. all files except the classes used to give the extraction command upon d-clicking and the manifest)?
Thanks!!

The following post won't solve the doubl clicking problem, but it will get you started on getting specific files from a Jar.
Go to:
http://forums.java.sun.com/thread.jsp?forum=22&thread=138514

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Extracting certain files from faulty HD

Hi, i'm trying to recover /home/kris/.zsnes/Legend of Zelda, The - A Link to the Past (U) [!].srm and (i guess, if i need it) /home/kris/.zsnes/Legend of Zelda, The - A Link to the Past (U) [!].zst first and foremost. They are zsnes and snes9x save files. I'm trying to recover them from a faulty HD which is an ext3 and is LVM2 formatted.
I can't mount the disk, nor does testdisk or photorec work(they both hang). SO since this is such a messed up drive i figured i would try to read the disk in hex and only extract the pieces i need to. I know "where" they are on the disk, as mentioned above, but i don't know where to go from here. I suppose to exert the disk as little as possible(to avoid more mucking up) i need to:
1. find out where the files are physically stored(hopefully they are in the same block/sector <- i don't really understand what this means _exactly_..)
2. read as little as possible/take as little a risk as possible and only extract exactly the bits needed and store them on the new HD as files.
But... HOW would i go about doing this, which programs would i use(the best would be if i could script it i suppose, as then i would only access exactly the portions i needed?) AND is there a better way? I'm thinking i could try ddrescue, but then i'd need to find out where these files are on disk first..

If you can't find any utilities that work, try this:
1. Create a few new .srm files, open them in a hex editor, and figure out what the header looks like (binary files usually start with something fairly identifiable so that e.g. zsnes knows it's looking at a proper .srm file). If you're even luckier, the file might even contain the ROM name or say, the name you gave your character, as plain text.
2. Open the raw disk in a hex editor, and search for the header you figured out in step 1.
3. Copy out the data starting at the point you figured out in step 2, for the length an srm file is for a Legend of Zelda save (look at the files you made in step 1).
4. If you're lucky, the first one will work. If not, rinse and repeat. Depending on how much you figured out in step 1, you may end up having to copy over every .srm file to find the right one. If you're unlucky, the file you're looking for could be corrupted, or if it's bigger than the block size of the drive (like hbekel said I think 4kB is a pretty typical value), it may be stored on non-consecutive blocks, in which case you're out of luck short of finding a tool that works.
I don't have any experience with hex editors in linux, although at first glance "hexedit" seems up to the task and is in the arch repos.
EDIT: I second hbekel's advice to image the drive ASAP in case it's a hardware failure.
Last edited by redden0t8 (2011-03-25 18:37:44)

Extracting class files of a certain package from a jar.

Hi,
I want to extract all the class files belonging to a certain package from a JAR file containing class files belonging to a different packages.
Can I do this using the jar tool, or use some other unzipping tool?
If it is best to use an unzipping tool which one can I use for windows?
Thanks,
Niranjan.

jar xf file.jar path/to/dir
For more info see http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/jar.html.

How can I extract certain pages from my document and save as another file?

How can I extract certain pages from my document and save as another file?

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Batch file extracting all files from nested archives

I have managed to leverage a powerful
forfiles command line utility with the mighty
7z compression program.
Below is a simple batch file extracting all files from nested archives hidden at any depth inside other archives and/or folders. After the extraction each archive file turns into a folder having the archive file name. If, for example, there was an "outer.rar"
archive file containing nothing but an "inner.zip" archive with only "afile.txt" inside, "outer.rar" becomes "...\outer.rar\inner.zip\afile.txt" file system path.
@echo off
rem extract_nested_archives.bat
move %1 "%TMP%"\%2
md %2
7z x -o%1 -y %TMP%\%2
del "%TMP%"\%2
for %%a in (zip rar jar z bz2 gz gzip tgz tar lha iso wim cab rpm deb) do forfiles /P %1 /S /M *.%%a /C "cmd /c if @isdir==FALSE extract_nested_archives.bat @path @file"
ARCHIVES ARE DELETED DURING THE EXTRACTION! Make a copy before running the script!
"7z.exe" and "extract_nested_archives.bat" should be in folders available via the %PATH% environment variable.
The first parameter of extract_nested_archives.bat is the full path name of the archive or folder that should be fully expanded; the second parameter is just the archive or folder name without the path. So you should run "c:\temp\extract_nested_archives.bat
c:\temp\outer.rar outer.rar" from the command line to completely expand "outer.rar". "c:\temp" must be the current folder.
Best regards, 0x000000AF

Incredibly useful! Thank you so much. I did make a couple of small changes to make the script a little easier to use from the end-user perspective.
First - I don't like making the user input the redundant second parameter, so I added this snippet which extracts it from the first parameter. The first line of the snippet enables delayed expansion so that special characters in our file name don't
break anything. The second line pulls the parameter into a variable, and the 3rd line uses delayed expansion on that new variable. Before implementing delayed expansion I had problems with file paths which included parentheses.
SetLocal EnableDelayedExpansion
Set SOURCE=%1
For %%Z in (!source!) do (
set FILENAME=%%~nxZ
set FILENAME=%FILENAME:"=%
Anyway once that was done, I just used %FILENAME% everywhere in the script instead of
%2 (making sure to correct quotes as needed)
This way, to run my script all you need to run is:
C:\temp\extract_nested_archives.bat C:\temp\Archive.zip
Second - I didn't want to modify the Windows environment variable. So I replaced
7z with "%PROGRAMFILES%\7-zip\7z.exe"
I also replaced extract_nested_archives.bat with "%~f0" (which represents the full path+filename of the current script).
Here is my full script now. Tested on Windows 8 with the 64-bit version of 7-zip installed:
@echo off
Setlocal EnableDelayedExpansion
Set source=%1
For %%Z in (!source!) do (
set FILENAME=%%~nxZ
set FILENAME=%FILENAME:"=%
move /Y %1 "%TMP%\%FILENAME%"
md "%FILENAME%"
"%PROGRAMFILES%\7-zip\7z.exe" x -o%1 -y "%TMP%\%FILENAME%"
DEL "%TMP%\%FILENAME%"
for %%a in (zip rar jar z bz2 gz gzip tgz tar lha iso wim cab rpm deb) do (
forfiles /P %1 /S /M *.%%a /C "cmd /c if @isdir==FALSE "%~f0" @path @file"

Extracting .s2p files from 8722A Network Analyzer?

Hi,
I wish to extract .s2p files from my HP 8722A Network Analyzer.
I could not find a driver for it. It is connected to my computer over GPIB.
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Go to Solution.

Nicolas,
Instead of extracting the .s2p files, which because of the age of the device (manual I found said 1991), could be very difficult, I think we would be better served communicating with the device directly and not using the files it creates. Instead of the process you described, we could set it to take a measurement, send the measurement to the computer, and have the computer do any manipulation/saving it may need.
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http://cp.literature.agilent.com/litweb/pdf/08720-90135.pdf
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Kyle Mozdzyn
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National Instruments
Regards,
Kyle M.
Applications Engineering
National Instruments

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Extracting certain files from a jar

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