Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields, ...

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 ...

Java 1.4 introduced the java.lang.StackTraceElement class to describe an element representing a stack frame in a stack trace. This class provides methods that return the fully qualified name of the ...