When writing Java programs, it's important not just to write clean, efficient code but also to document it effectively. One way to do this in Java is by using JavaDoc, a built-in tool that generates HTML documentation based on comments in your code. This documentation is incredibly useful for other developers (and even for yourself) to understand what your code does, its parameters, and its expected outcomes.
In this post, I’ll walk you through the basics of JavaDoc and how to use it effectively in your Java programs.
JavaDoc comments are not just regular comments. They are structured in a way that helps you automatically generate user-friendly HTML documentation for your classes, methods, and fields. This is especially helpful when working in teams or creating APIs where others need to understand how to use your code.
To write JavaDoc, you use special block comments that begin with /** and end with */. Let's take a look at the following example:
package basics;
/**
* This class demonstrates how to create JavaDoc for a simple Java class.
*
* @author Arshi Saxena
*/
public class CreateJavaDoc {
/**
* This method performs a simple addition of three numbers.
*
* @param a -> the first number
* @param b -> the second number
* @param c -> the third number
* @return -> the sum of a, b, and c
*/
public int add(int a, int b, int c) {
return a + b + c;
}
}
Class-Level JavaDoc:
Method-Level JavaDoc:
Here are some of the most commonly used JavaDoc tags:
@author: Specifies the author of the class.
@param: Describes a parameter in a method.
@return: Describes the return type of a method.
@throws or @exception: Describes the exceptions thrown by a method.
@deprecated: Marks a method or class as deprecated, meaning it should no longer be used.
@see: Refers to another method or class for more information.
If you're using an IDE like Eclipse or IntelliJ IDEA, JavaDoc comments are incredibly helpful. You can hover over classes and methods to see the JavaDoc descriptions directly in the editor.
Writing clear, concise JavaDoc comments is a small effort that goes a long way in improving the readability and usability of your code. Whether you’re working on a personal project or collaborating in a team, using JavaDoc ensures that your code is well-documented and easy to understand.
Java Fundamentals: Data Types
Check out my series on Array Interview Essentials for more tips and insights into Java programming.
Happy Coding!
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