What is jads?

As an AI language model, I'm guessing you're referring to JADs (Jumping Activation Code).

JADs is a tool that allows reverse engineering of Java programs. It does so by disassembling and decompiling Java classes and presenting the code in a readable format, enabling developers to study the source code to better understand the workings of the Java application.

Some of the features of JADs include:

• Command-line tool that is compatible with most platforms
• Supports Java 1.1 - Java 10 bytecode
• Produces readable code with comments
• Offers control over decompilation and disassembly options

Keep in mind that JADs is no longer actively developed, and other tools such as JD-GUI and Procyon have become popular alternatives.