JadEclipse

download JadClipse JAR click here

Installation:

• Put the JadClipse JAR file into the pluginsfolder of your Eclipse installation.
• Restart Eclipse (eclipse -clean).
• Get Jad.
• Put the Jad executable into a directory that is in the execution path of your operating system. Alternatively, you can configure the path to the Jad executable under Window > Preferences... > Java > JadClipse > Path to Decompiler. (Set the full path, e.g. C:\Program Files\Jad\jad.exe)
• Go to Window > Preferences... > General > Editors > File Associations and make sure that the JadClipse Class File Viewer has the default file association for *.class files.