How to create a Help document (API) for Java

How to create a Help document (API) for Java

The steps are as follows :
(1) Write a tool class
(2) Add a document comment to this class
(3) Parsing document annotations with tools
Javadoc Tools
(4) format
javadoc-d Directory-author-version Arraytool.java

Make a Help document (API) Error Resolution:
Cannot find a public or protected class that can be documented
This statement tells us that there is not enough permission on the class you want to manipulate. Add public to the front of the class.
As shown in 02:

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　　When we do development in the future, the things we give to others are xxx.class files and help documents (APIs). Others use the Xxx.class file through the Help documentation (API).
　　This is the object-oriented thinking, I do not care how you achieve it! I will be able to meet your terms.

How to create a Help document (API) for Java