How to decompile java class files

--Environment --Windows10 64bit version 1903 - Eclipse Version: 2019-12 (4.14)

Install the Java decompiler

  1. Download Jad 1.5.8g for Windows 9x-NT-2000 on Intel from JAD Decompiler Download
  2. Unzip the zip
  3. Store the jad.exe from the zip in $ JAVA_HOME / bin -OK through PATH without entering $ JAVA_HOME

It's OK if something like help comes out with jad

$ jad
Jad v1.5.8g. Copyright 2001 Pavel Kouznetsov ([email protected]).
Usage:    jad [option(s)] <filename(s)>
Options: -a       - generate JVM instructions as comments (annotate)

Decompile class files

# 1.Check the location of the class file
$ find /c/app/pleiades/workspace/ponsuke/ -type f -name PonsukeMain.*                                                                             /c/app/pleiades/workspace/ponsuke/src/main/java/ponsuke/

# 2.Decompile
$ jad -a /c/app/pleiades/workspace/ponsuke/target/classes/ponsuke/PonsukeMain.class
Parsing C:/app/pleiades/workspace/ponsuke/target/classes/ponsuke/PonsukeMain.class... Generating PonsukeMain.jad

# 3.A decompiled jad file will be output to the current location, so view it with an editor etc.
$ ls -la | grep PonsukeMain
-rw-r--r--1 ponsuke 197609 3296 April 2 23:32 PonsukeMain.jad

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