How can I edit code in a .class file in a .jar file using Android Studio? I have already tried to edit it of course. The class I am trying to edit is a read only for some reason.
Jar files are compressed archives (zipped files) of .class files( and few other resources). .class files are compiled .java files. You can not edit a compiled file in normal situation unless you decompile to get source code, edit the code and recompile again.
Decompiling is a tedious process, thus getting a source code is the best option here.
Note: You can rename the .jar file to a .zip file and can open it using any compression tool such as winrar or winzip to see the content.
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I need to debug or better to patch a .jar file which is loading from other Jars / .exe File.
I can decompile the .jar pretty well but it seems to be that Eclipse or IntelliJ need a main function to debug it.
Is there a Way to decompile it change the specific class, recompile all and replace the .class /.java file into the packed jar? A complete compile of all decompiled files from the .jar will not possible i think. There are some "unable to decompile" Marks in other, for me not relevant .class files
I have a .jar file and When I extract it, It gives me all the .class files present in that jar file.
I have decompiled all the .class files using http://jd.benow.ca/ tool but i want that all the .class files should save into .java files.
Right now i can see only the code but extension is not converting to .java.
Anybody Please help me in this.
you can use javadecompilers and its works perfectly
and in the next step you decompile with Upload and Decompileand this page be showing
and thats is just copy the package folder from the jarname.zip and paste it in you project.
i tested its work for me .
you can see this answer for more.
jd-cmd
https://github.com/kwart/jd-cmd
works fine for decompiling. I used it to convert whole jars into source code. Look up the command line options for more details, e.g. --outputDir for specifying a directory for the generated source code.
I have always used this to decompile any .class file to readable format. However, now I need to change around 30-40 .class files to readable format to push to my github. How may I change all the .class files to readable (.java or .txt) at once?
JAR (or ZIP) all the classes you want decompiled together.
Launch JD-GUI and open your jar (zip) archive.
Use "File" - "Save JAR Sources" menu option. It will decompile everything from your archive and save their sources into another zip file.
You would then need to unzip the ZIP file, and add it to a git repo before push.
I get jar file with library from NetBeans and i cant convert it to apk.
Converter ask JAD and JAR files.
I have one main jar and two more in lib folder.
You can't convert .jar file to .apk!
inside a jar file we have .class files but inside the .apk we have .dex files which .dex files can convert to .class and after that .java.
so you can see a jar file is one step behind the .apk file
Change the project(module) settings from library to application.
I am using eclipse IDE and want to edit the attached source file of the jar file. For doing this i downloaded the src.zip and attached the file, but it is opening as a .class though I am able to read the file (which is a .class file) but i also want to edit the file.
Why I am not allowed to edit it? how to open an attached file with .java extension not .class extension.
thanks in advance
That's not possible. In order to edit the source, you have to unpack the JAR and create an eclipse project, from which you can then create a JAR with the modified code.
Because you have to link it... Source files are not tied to compiled classes in jar, so if you edit it, nothing will happen to the jar file
You have to create a separate project in Eclipse, and rebuild the jar with your modifications
.class files are not readable by human being unless you decompile it. Many decompilers exist. Carefull about what you are allowed to do and what you aren't, though...
Usually, .java aren't in .jar.