What is encapsulation in flutter?

The encapsulation happens at library level, not at class level . There is a simple rule: any identifier (class, class member, top-level function, or variable) that starts with an underscore _ it is private to its library.

By definition, encapsulation describes the idea of bundling data and methods that work on that data within one unit, like a class in Java . This concept is also often used to hide the internal representation, or state of an object from the outside. This is called information hiding.

Encapsulation in Java is a process of wrapping code and data together into a single unit, for example, a capsule which is mixed of several medicines . … The Java Bean class is the example of a fully encapsulated class.