Because JAD does not natively support newer Java features like Lambdas or Generics, developers working on modern applications often prefer the following: Java Decompiler
Navigate to > Preferences > General > Editors > File Associations .
Download the net.sf.jadclipse_x.x.x.jar file from SourceForge. download jad decompiler plugin for eclipse
Since the official JAD website is no longer active, you must use reliable mirrors to get the necessary files.
Close and reopen the IDE to let it recognize the new plugin. 3. Configure JAD in Eclipse Because JAD does not natively support newer Java
Set the to a valid temp folder. 4. Set File Associations To ensure class files open with JAD automatically:
Move this .jar file directly into your Eclipse installation’s plugins folder. Close and reopen the IDE to let it recognize the new plugin
The plugin acts as a bridge; you still need the actual engine to perform the decompilation.