Thread: class files inside exe : can i edit them ?

Sup java masters , ive got a question for ya. Ive got an .exe => I open it and find inside some libraries and .class files .
Can I edit some of those .class files and replace the old ones or maybe pack the .exe again ?

Originally Posted by Norm

Maybe, but it won't be easy. class files are output by the javac compiler. A class file's format is documented so you can probably take it apart and build a new one with a lot of careful programming. It would be easier to work with the source file that created the class file.

I don't know anything about opening an exe file, removing its contents and packing it again.

Editing .class file is pretty easy and compiling back as .class. THe problem is how to replace/repack again ?

Is any way to create a new .exe or replace with the new .class files ? Anybody pls ?

Originally Posted by Norm

Java does not create exe files. This doesn't seem like a java programming problem.
Have you tried asking about this on a forum for exe files?

The class files are written in java, im pretty sure.
And the app graphics (GUI is called i think) is created with Java Scene.
I dont know how he packed that .exe

What forum for exe files btw ?

Originally Posted by Norm

Do you have access to a Search Engine?

I thought u can recommend me that kind of website

Note the name of this web site. Web sites do exist that will help you find other web sites. One of them starts with "Google."

Originally Posted by copeg

I would also recommend thoroughly reading the license of the 'exe' you with to alter - in most cases software licenses prohibit reverse engineering, which is exactly what you seem to be trying to do.

Nope, cuz it's my own program.

I've read this Using JAR Files: The Basics (The Java™ Tutorials > Deployment > Packaging Programs in JAR Files) : How can i ipen the Java archive tool ? Where is it ?

Originally Posted by Norm

The jar program is in the JDK's bin folder.

Ok, I did it using the cmd.

One last question: how can I edit a .class file (and save it as .class) ?

Originally Posted by Norm

In post#2

There might be some programs out there that do that. I've never seen one.

I've managed to open a .class file and it's written in normal java lang, but I'm editing it as .java. How can I compile this edited file to .class ?

Ive got a problem with the jdk exe's (javac, jar tools etc) If i double click them , they open and close immedeatly. WHY ?

I can use those .exe by opening cmd and typing name.exe
Is this the only way ?