Such a class is known as a utility class. An example of a utility class is the Java standard class library’s Math class. Advanced techniques: Fields and methods in Java Learn seven advanced ...

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.

The full class is coded below: /* Java serialization example class */ package com.mcnz.serialization.tutorial; import java.io.*; public class Score implements java.io.Serializable { private static ...