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.

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

However, there are collection classes in Java that act like a Java array but resize themselves automatically. Any class that extends the List interface expands dynamically. Java arrays do not expand ...

Your Java programs will also consist of classes that can represent objects from the real world. If a class is a data type, an object is a representative of a particular type.

Don't let the occurrence of a RuntimeException in Java bring your code to a standstill. Here are 10 examples of how to avoid runtime exceptions in Java.

As they exist outside the Java heap, the klasses do not require a Java object header, and they are not the same thing as the class objects used in reflection (which are genuine Java objects).