APIs (Library Support) - Java Tutorial

JAVA APIs (Library Support)

An application programming interface (API), in the context of Java, is a collection of prewritten packages, classes, and interfaces with their respective methods, fields and constructors.

A set of hypertext markup language (HTML) files provides information about the API
One package contains hyperlinks to information on all of the classes
A class document includes the class hierarchy, a description of the class, a list of member variables, a list of constructors, and so on