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 ...

A class is a blueprint for creating objects. An object is an instance of a class. A method is a function inside a class that performs an operation. The method signature includes the method name, ...

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 ...

How to Create Bitmap Objects of an Image File on Android. Developing apps for the Android platform allows you to handle various media types users have on mobile devices, including image files.

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