data encapsulation

In C++, classes are the building blocks of object-oriented programming (OOP). They serve as blueprints or templates for creating objects. Classes define the structure and behavior of objects, encapsulating data (attributes) and functions (methods) that operate on that data.

Encapsulation means that covering up of data under a single unit.

By defining your own classes, you can produce user-defined data types in Java. These classes let you create unique data structures that encapsulate data and action. Here is how to make a Java user-defined data type: