Covariance and contravariance might seem esoteric, but you'll need these concepts more than ever as the Java language evolves. Get started with type dependency in array types, generic types, and ...

One of the trickier aspects of "general Java" development is related to comparing Java reference types for equality.

Project Valhalla has posted a major update and has announced some initial, very early-stage design concepts for value types in the JVM.

Oracle has been working to bring value types to the Java language and runtime. We present an update on the current status of this work.