 Tip #54: View a Java Class File Decompiled thru Vim
| tip karma |
Rating 148/48, Viewed by 13732
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| created: |
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March 22, 2001 18:21 |
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complexity: |
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intermediate |
| author: |
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[email protected] |
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as of Vim: |
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5.7 |
Hi All,
Wish u could view a Java Class File using Vim,
Well ur query ends here.
First of all u will need a Java Decompiler to decompile
the Class File.
I would suggest the JAD decompiler by Pavel Kouznetsov
http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
Its a command line decompiler and absolutely free.
U can use any command line decompiler of ur choice.
Next create a vimscript file called jad.vim as
######################### FILE START ################
augr class
au!
au bufreadpost,filereadpost *.class %!d:jad.exe -noctor -ff -i -p %
au bufreadpost,filereadpost *.class set readonly
au bufreadpost,filereadpost *.class set ft=java
au bufreadpost,filereadpost *.class normal gg=G
au bufreadpost,filereadpost *.class set nomodified
augr END
######################## FILE END #####################
Note:- Keep the Jad.exe in a directory with out white spaces.
The -p options directs JAD to send the output to standard output
instead of a .jad file. Other options are described on the JAD site.
Next add the following line in the .vimrc file.
so jad.vim
Next time u do vim abc.class. Viola u have the source code
for abc.class.
NOTE:- I have written the script so as to open the class file
read only, So that u dont accidently modify it.
U can also exted this script to unjar a jar file and then view each
file in the JAR file.
thanks
bhaskar
Any suggestions are welcome
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Additional Notes
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[email protected],
August 21, 2001 13:54
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Hi,
first I love this script
I modified this a little bit to use the improved file runtime organisation of vim60, I don't know if other will like it better but here it is:
I added to filetype.vim:
augroup filetypedetect
au! BufRead,BufNewFile *.jad setfiletype java
au! BufRead,BufNewFile *.class setfiletype class
augroup END
and created in ftplugin a class.vim with
%!jad.exe -noctor -ff -i -p %
set readonly
set ft=java
normal gg=G
set nomodified
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roel@SP-AM_almende.com,
February 24, 2004 6:00
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If you don't want to 'hit ENTER' after every decompilation, you can add 'silent' to some of the lines:
au bufreadpost,filereadpost *.class silent %!jad -noctor -ff -i -p %
and maybe even:
au bufreadpost,filereadpost *.class silent normal gg=G
(thanks to myitcv on #vim@EFnet)
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[email protected],
June 6, 2004 23:06
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Nice script!!
I can now select any class file, right click, and select the "Edit with Vim" option to view the source.
I'm just wondering, how do I change this to if I do the same to a jar file, and it will show me the contents of the jar file, as in a jar -tf, and if I select any of the entries, I can view the source?
I tried opening the jar file using WinZip, and if I view any of the entries in it using vim, I'll get something like this:
JavaClassFileReadException: can't open input file on `C:\Documents'
JavaClassFileReadException: can't open input file on `and'
JavaClassFileReadException: can't open input file on `Settings\gwunwai\Local'
JavaClassFileReadException: can't open input file on `Settings\Temp\Version.class'
I think that's because WinZip extracts the zip entries into my temp directory, which contains white spaces.
Is there some way around this?
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Anonymous,
July 13, 2005 11:18
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you can change the command to %!jad.exe -noctor -ff -i -p "%"
(enclosed the % with quotes). It worked for me
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