This post shows readers how to create an array in Java. Including: Array Lists, multidimensional arrays, maps, and more.

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 ...

Create packages, import packaged classes and interfaces into your programs, move packages, and encapsulate them in jar files.

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.

Java's default constructor lets developers create instances of classes when an explicitly defined constructor does not exist. Here's how it works.