Open a terminal and type jad . You should see a list of command-line options. Basic Usage and Commands
This creates a FileName.jad file in the same directory. You can rename this to .java to view it in any text editor. Common Flags: download java decompiler jad
The Java Decompiler (JAD) remains one of the most iconic tools in the software reverse engineering world. Although it is no longer actively updated, its speed and accuracy in reconstructing source code from .class files make it a staple for developers maintaining legacy systems. Open a terminal and type jad