Last Updated : 18 Feb 2026

In this chapter, we will learn how to use Javadoc to create professional API documentation.

What is Javadoc?

Javadoc is a powerful tool provided by Java to generate HTML-based API documentation directly from your source code comments.

With Javadoc, you can describe classes, methods, constructors, and fields using special documentation comments. These comments are then converted into well-structured, easy-to-read web pages that can be shared with developers or users of your API.

Example: Creating Javadoc for a Simple Class

Let's create a simple Java class with Javadoc comments to document a method that calculates the cube of a number.

Explanation

• The comment starting with /** ... */ is a Javadoc comment.
• The class M has a Javadoc description explaining its purpose.
• The method cube(int n) also has a Javadoc comment with a description and a @param tag for the method parameter.
• You can generate HTML documentation using the javadoc tool, which will produce a professional API document for this class.

How to Generate Javadoc?

• The comment starting with /** ... */ is a Javadoc comment.
• The class M has a Javadoc description explaining its purpose.
• The method cube(int n) also has a Javadoc comment with a description and a @param tag for the method parameter.
• You can generate HTML documentation using the javadoc tool, which will produce a professional API document for this class.