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 ...

Generics in Java programming Why use generics? How to use generics for type safety Generics in the Java Collections Framework Examples of generic types in Java Raw types vs. generics Why use generics?

Bizarre eh? That’s why we refer to these types of conversions as unsafe casts, and because they are unsafe is why the compiler won’t do them automatically for you. Casting down: The loss of precision ...