Welcome to our exploration of sorted maps using custom classes and comparators in Java. In today's lesson, we'll learn how to use custom classes as keys in sorted maps. This approach enhances data organization and access. With the addition of comparators, we can dictate the order in such maps.

A sorted map is a dictionary with its keys always in order. This arrangement makes operations like searching for keys within a range more efficient. In Java, we use the TreeMap class to create sorted maps:

Custom classes enable us to create objects that fit our data — for instance, a Person class for employee information or a Book class for a library database. In Java, classes are the blueprints for creating objects.

Consider this simple class, for example: