Eclipse–Decompiler to read the .class files while debugging

Installing this is very simple. Just drag and drop the icon in your running eclipse (Juno)

Jadeclipse

Hope this link still work works : –
http://marketplace.eclipse.org/content/jadclipse-eclipse-4x#.UZH7YKJHI1N

 

JadClipse for Eclipse 4.x also support Eclipse 3.x, and provides several new features:

1. Integrate jad.exe into the plugin, don’t need to set jad path in the preference page again.
2. Add two options in the JadClipse main preference page:
(1) Use Eclipse member sorter
(2) Show decompiler report
3. Update the formatting preference default settings, the “Output fields before methods” setting’s default value changes to true.