In Java, nested classes are categorized as either static member classes or inner classes. ... Inner class type 2: Local classes. It’s occasionally helpful to declare a class in a block, ...

The above class runs through several popular Map implementations (EnumMap, HashMap, LinkedHashMap, TreeMap, Hashtable, WeakHashMap, ConcurrentHashMap) and prints out whether each Map ...

Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...