References on generics

• General information  -- read this!
• Tutorial (by Bracha, the lead generics designer for Java) -- read this!
• Torgersen, Hansen, Ernst, Ahe, Bracha and Gafter, Adding Wildcards to the Java Programming Language, Proc. 2004 ACM Symposium on Applied Computing, 2004, pp. 1289 - 1296.
• Bracha, Cohen Kemper, Odersky, Stoutamire, Thorup, and Wadler, Adding Generics to the Java Programming Language:
  Public Draft Specification, Version 2.0, 2003
• Anastasiade, Optimizing Web Services Using Java, Part I - Generic Java and Web Services,  Web Services Journal, Vol. 3 No. 12, 2003.  -- Has a nice description of wildcards in terms of invariance, covariance, contravariance and bivariance.
• Peter von der Ahe's weblogs -- contains interesting discussions on wildcards and wildcard capture.  Ahe is one the designers of the Java generic system.
  • Why is the Capture of a Wildcard Incompatible with Itself?
  • Inference and Compound Types
• Klaus Kreft and Angelika Langer
  • Language Features of Java Generics, JavaPro Magazine, March 3, 2004
  • Implementing Java Generics, JavaPro Magazine, March 10, 2004
  • Arrays in Java Generics, Oct. 30, 2003
  • Java generics FAQ
  • Links to more Java generics information
• Mika Haapakorpi, Meta Programming in Java