JAD
lastmod 2019-10-29created 2019-10-292 edits
Jad (Java Decompiler) is, as of August 2011, an unmaintained decompiler for the Java programming language. Jad provides a command-line user interface to extract source code from class files.
As http://www.kpdus.com is no longer accessible, JAD Java Decompiler download is extremely hard to find. Here is a mirror where you can get JAD for various platforms.
Example
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jad -o -r -sjava -dsrc D:\down\classes_dex2jar\**\*.class - Decompiles all class files to java into the
srcdirectory.