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 ...

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 ...

This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, static methods, and more!

However, the Java Platform provides a data structure that greatly simplifies the use of reference objects like this, called the java.util.WeakHashMap class. WeakHashMap works exactly like a hash ...

Today, C++, C#, Java, Visual Basic.NET and Python are popular object-oriented languages. The following compares basic OOP terms with traditional programming. See object-oriented DBMS .

The best way to teach the concept of Java user input to new software developers is to show them how to use the highly visual and user-friendly JOptionPane class from the Swing package. With one simple ...

The class in this example only defines properties. It contains no explicitly defined Java constructors. When no explicitly defined constructors exist, Java's virtual machine makes object creation ...