Static classes and inner classes in Java

Nested classes are classes that are declared as members of other classes or scopes. Nesting classes is one way to better organize your code. For example, say you have a non-nested class (also known as a top-level class) that stores objects in a resizable array, followed by an iterator class that returns each object. Rather than pollute the top-level class’s namespace, you could declare the iterator class as a member of the resizable array collection class. This works because the two are closely related.

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. In this tutorial you’ll learn how to work with static member classes and the three types of inner classes in your Java code.

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