Java Development

[javame_black]

Hi,

I want to know is it possible in blackberry to decompile the source code. If we distribute the application with .alx file then are there any chances of it getting decompiled. If it is, then can someone tell me how to avoid that. I know about obfuscators such as Proguard, but is there any need of using it.

Hope to get a reply soon.

[BBDeveloper · Accepted solution]

Check this KB article.

http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800901/How_To_-_Obfus...

[simon_hain]

as long as you distribute with cod-file there is no need to use an obfuscater.

[samajdarsudipto]

hi,
I have read the contents in this link. what will be the problem if we use the obfuscated jar directly to create a COD?

[shism2]

There is  a decompiler for cod files. So, you should obfuscate the code. It is possible to decompile to source code.

[samajdarsudipto]

Hi,

Thanks for the reply. I am facing another issue.

I am creating jar jad say sudipto.jad and sudipto.jar. then inserting a license file in the jar. then updating the jarsize in jad and the jar jad runs fine. but when I am creating a cod file from them using RAPC, the created sudipto.cod is not getting installed in the BB 4.7.0 simulator as well. I am trying with "load java program" from files to install that cod but nothing comes in the download folder. But when I am creating cod from the jar jad without licebse file inserted, its installing fine.

Is my cod file is getting corrupted as I have manually inserted the license in the jar?

plz give some solution.

when I am attaching the debugger in the debugger the below message is coming.

JVM: error in sudipto.cod

plz suggest.

[anditsung]

ofuscator still can be decompile

but harder to trace it

[shism2]

Look into using Zleix KlassMaster. It performs advanced obfuscations.

[shism2]

Follow this guide:

http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800901/How_To_-_Obfus...

and don't manually insert anything.