In Java, nested classes are categorized as either static member classes or inner classes. Inner classes are non-static member classes, local classes, or anonymous classes. In this tutorial you ...

It’s a good idea to use an abstract class when you need to implement mutable state. As an example, the Java Collections Framework includes the AbstractList class, which uses the state of variables.

It has always been a mystery to me: Why do instructors teach Java always subject students to console-based input with the JDK’s Scanner, Console or InputStream classes ... position of the option ...