Since Java 21, wrapper classes have played an increasingly sophisticated role in Java’s type system. Here’s everything you ...

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 ...

In Java, it is considered best practice to camel case when choosing class names with the first word capitalized. Camel case simply means that you remove all spaces and use capitalization for each ...

Specifically, records, sealed classes, and pattern matching work together to enable easier data-oriented programming in Java. Project Amber has brought a number of new features to Java in recent ...

The Java input/output (I/O) facilities provide a simple, standardized API for reading and writing character and byte data from various data sources. This article explores the I/O classes ...

When writing a Java application which relies heavily on a JSON API, it’s almost always necessary to deserialize the JSON data into native Java classes. The process goes something like this: ...

Properties represent the data an object possesses, while methods enable the intelligent manipulation of that data. However, to perform any meaningful operations with the data a class contains, the ...

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...

Quite often, a Java class simply represents data. In a data transfer class, no methods are required, the class has no need to support future extensibility and the data itself is immutable for the life ...