Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications ... rather than focusing separately on data structures and functionality.

Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...

Records are classes that act as transparent ... examples going beyond the classic data transfer objects (DTOs). After a second preview was released in Java 15 (JEP 384), the final version was ...

Becoming popular in the early 1990s and the norm today, object-oriented programming (OOP) languages, such as C++ and Java ... to the data. These user-defined data types are called "classes ...