There is a paper, Pizza into Java: Translating theory into practice, from Odersky and Wadler at POPL 97 about how to mix generics, lambda and pattern matching i

There is a paper, Pizza into Java: Translating theory into practice, from Odersky and Wadler at POPL 97 about how to mix generics, lambda and pattern matching in a Java like language. C# and Java are slowly catching up :)