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

Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.

In Java, nested classes are categorized as either static member classes or inner classes. Inner classes are non-static member classes, local classes, or anonymous classes.

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 ...