Jabclipse (net.sf.jadclipse_x.x.x.jar)”http://sourceforge.net/projects/jadclipse/
Copy the downloaded Jad Eclipse plugin – Jabclipse(jadclipse_x.x.x.jar) to Eclipse plugin folder.
For example,
D:\eclipse\plugins\net.sf.jadclipse_3.3.0.jar
Restart Eclipse. Done. We can configure it even, windows->preferences -> jad
