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 an array is a way of storing multiple items of the same type. In this quick tutorial we introduce you to the very basics.

Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions.

Java object serialization is a feature of the JDK that is far too often overlooked. When a developer puts together a prototype or cooks up a proof of concept, simply saving a serialized Java object to ...

Learn about serialization in Java with our comprehensive tutorial. We provide examples to help you understand how serialization works.

Reference objects aren't just useful when memory is at a premium; they can also be used to provide slick caching abilities to any application.

Java provides a data structure, the array, which stores a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to ...

It contains no explicitly defined Java constructors. When no explicitly defined constructors exist, Java's virtual machine makes object creation possible by providing a default constructor to ...