which can operate on various data types while maintaining compile-time type checking. In previous articles, I’ve introduced the essentials of generics programming in Java and advanced techniques ...

Array types in Java are not implicitly contravariant ... class Generic<T> { T data; void write(T data) { this.data = data; } // T is input parameter type T read() { return data; ...

Primitive types represent the simplest, most direct way to represent data in code. Even the most complicated classes in Java can be flattened down to nothing more than the set of primitive data types ...