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, ...

Regardless of type, all nested classes share a common feature in that they are compiled into their own separate class files. The relation between static inner classes and their enclosing outer classes ...

Apart from being defined inside another class, a static nested class behaves just like a regular top-level class. It can define both static/non-static members and can only access other static members ...

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 ...