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jEE : how to covert CLASS file to JAVA file

Posted on 2013-01-09
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Last Modified: 2013-01-25
your assistanc required.


please advice how to convert CLASSS into to JAVA file.
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Question by:mac_g
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8 Comments
 
LVL 16

Expert Comment

by:Valeri
ID: 38758095
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LVL 16

Accepted Solution

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krakatoa earned 120 total points
ID: 38758119
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Author Comment

by:mac_g
ID: 38758317
i did .
simple class file HelloWorld.class is seems to be OK.

my multiline programe giving the below error mesage
---

D:\tempshare\visio>jad HrwsBase.class
Parsing HrwsBase.class... Generating HrwsBase.jad
Couldn't fully decompile method _mthclass$
Couldn't resolve all exception handlers in method _mthclass$

D:\tempshare\visio>
-----------

please advice how to procede further
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LVL 12

Assisted Solution

by:Sharon Seth
Sharon Seth earned 240 total points
ID: 38758356
What kind of class is it ?
Pls note that decompling does not convert the CLASS into a JAVA file 100% . There are several places where assumptions are made by the decompiler.
Also , I had used DJ java decompiler . You can give it a try too
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Author Comment

by:mac_g
ID: 38758447
this class file developed in  JAVA-1.4 release .

are theere any decompilers specific to version ?

As you said, I have tried  with DJ java decompiler, some of the charectors i am getting are ,$, _...etc.

please advice, is there any paid tools which can do this work.

If you are interested, i can attach the class file which i am trying for your test.

Thanks for your efforts.
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LVL 16

Assisted Solution

by:Valeri
Valeri earned 240 total points
ID: 38758763
Hi mac_g,

The decompiler I recommended you is not so good. I wanted to recommed you the one that "krakatoa" did!
Ok, please attach you .class file.
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LVL 16

Assisted Solution

by:Valeri
Valeri earned 240 total points
ID: 38758791
btw decompliler is not able to revert to the original .java file! there are a lot of assumptions, because when the .java file is compiled the compiler makes a lot of "improvements" as well.
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LVL 12

Assisted Solution

by:Sharon Seth
Sharon Seth earned 240 total points
ID: 38762009
Any kind of decompiler would end up showing $ , _ etc . The reason is that the CLASS file which itself would have had many modifications/substitutions during compilation
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