Java Decompiler

FernFlower - CLI Java Decompiler

https://the.bytecode.club/showthread.php?tid=5

.JAR and .Class to Java decompiler

http://www.javadecompilers.com/

Fernflower and IntelliJ IDEA's java-decompiler

https://stackoverflow.com/questions/39864346/fernflower-and-intellij-ideas-java-decompiler

eclipse marketplace

https://marketplace.eclipse.org/category/free-tagging/fernflower

A Quick Look at Java Decompilers

http://blog.macuyiko.com/post/2015/a-quick-look-at-java-decompilers.html

Download JAR file decompiler-fernflower 3.0.0.Final with all dependencies

https://jar-download.com/explore-java-source-code.php?a=decompiler-fernflower&g=org.jboss.windup.decompiler&v=3.0.0.Final&downloadable=1

Eclipse “Enhanced Class Decompiler” plugin does not decompile when debugging

https://stackoverflow.com/questions/48396661/eclipse-enhanced-class-decompiler-plugin-does-not-decompile-when-debugging