Java Decompiler [Newest]
If you are writing a report or paper and need a summary of the landscape without reading 30 pages, the standard academic consensus is:
"Soot: A Java Bytecode Optimization Framework" Authors: Patrick Lam, Ondrej Lhotak, Laurie Hendren Published: IBM Research Report java decompiler
"A Comparison of Java Decompilers" Authors: M. Miecznikowski, S. Drape, and A. H. Martin (University of Auckland) Published: Proceedings of the Ninth Working Conference on Reverse Engineering (WCRE 2002) If you are writing a report or paper