A Collection in simple terms means when a group of similar things, often a group created by someone is known as a collection. A collection when collected works like a container – it groups multiple ...

Java is an object-oriented programming language, but there’s more to Java than programming with objects. This tutorial is the first of several introducing non-object-oriented features and syntax that ...

But I don't know how to edit objects of the class based on the input from the user. Or if that is even possible. Yes it's possible. You're already doing it for firstname and lastname. From what you've ...