The Lambada framework provides facilities for fluid interoperation between Haskell (currently both Hugs and GHC using non-Haskell98 extensions) and Java. Using Lambada, we can call Java methods from Haskell, and have Java methods invoke Haskell functions. The framework rests on the Java Native Interface (JNI). The Lambada release includes a tool for generating IDL from Java .class files (using reflection), which is fed into our existing HDirect to generate Haskell-callable stubs. 