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

Abstract and Nested Classes - 23m Practice 5-1: Applying the Abstract Keyword - 14m Practice 5-2: Implementing Inner Class as a Helper Class - 7m Practice 5-3: Using Java Enumerations - 11m Skill ...

Nesting classes in interfaces. One of Java’s stranger language features is the ability to nest a class inside an interface. As with a nested interface, the nested class is implicitly public and ...

In Java nested classes are classes that are defined inside another class. The purpose of a nested class is to clearly group the nested class with its surrounding class, signaling that these two ...