What is Jobfuscate?

Jobfuscate

Jobfuscate is a handy tool for software developers that helps protect your Java class files by obfuscating them. Why is this important? Well, without this protection, anyone could use a Java decompiler to reverse-engineer your code and see everything you've worked on!

The Problem with Java Class Files

Java class files are packed with symbolic info from your source code. This includes all those variable names and method names you've chosen. When someone gets their hands on your class files, they can easily reconstruct your whole source code using a Java decompiler! If you haven't tried one yet, I suggest you do. It's quite eye-opening! Without obfuscation, shipping Java class files is like handing out copies of your source code.

The Jobfuscate Solution

So, what's the fix? Jobfuscate removes all the symbolic information that can be stripped away. You can use descriptive variable names and method names in your Java code without worry! Once you run it through Jobfuscate, it renames all those classes, variables, and methods to meaningless strings. And don't worry about bugs because it doesn't mess with the Java bytecode like some other tools do.

How to Use Jobfuscate

The command looks pretty simple: jobfuscate [-options]* class*

• -log: Redirects stdout/stderr to a file.


• -out: Names the output JAR file (default: java.jar).


• -store: No compression in the JAR file.


• -x: No renaming of classes/methods/fields.


• -xc: Exclude all class renaming.


• -xm: Exclude all method renaming.


• -xf: Exclude all field renaming.


• -trial: Runs in trial mode for debugging.


• -sys: Identifies system classes by pattern.


• -serializable: Type = off|relaxed|strict.


• @ each line in <options>.


• Main class file plus other class files.

An Example Command

If you want to try it out, here's an example command:
set classpath=c:\\test
jobfuscate -x:acme.* -xc -xm:io.*.run myprog.main

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