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New Doclet

A new enhanced doclet (written by Gerald Boersma) is now available.

It has much more option than the legacy previous one.

You will find detailed instructions here.

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Legacy Javadoc

When the javadoc tools build the documentation, it copies all files included in the doc-files directory to the javadoc . (see How to Write Doc Comments for the Javadoc Tool).

You can take advantage of this feature like this:

package net.demo1;
/**
* Demonstration for PlantUML.
* <p>
* Example of use:
* <p>
* <img src="doc-files/image1.png">
*/
/*
* @startuml doc-files/image1.png
* Bob -> Alice : hello
* Alice --> Bob : OK
* @enduml
*/
public class Demo1 {

}

If you run PlantUML before the Javadoc, it will generate image1.png in the directory doc-files .

Then, when you launch the Javadoc tool, you will have the following result:

Note that the definition of the image itself is in a non-javadoc comment, so that it is not exported to HTML.

As you can see, adding UML diagrams into java documentation is now really easy.