For example, the KeySet non-static member class describes a set-based view of the keys contained in the map. ... For example, the Matcher class, in java.util.regex, ...

Many core Java classes and objects implement the Comparable interface, which means we don’t have to implement the compareTo() logic for those classes. Here are a few familiar examples: String ...

Java constructor overloading example. Imagine a simple Java class that represents a point on a Cartesian plane. The class has two properties: x and y. The following code is an example. public class ...