How eclipse generates javadoc

There are three main methods to generate a document (javadoc) using Eclipse:
1. Right-click the project list, select Export (export), select javadoc under Java in the Export (export) dialog box, and submit it to the next step.
Note the following two points in the javadoc generation dialog box:
Javadoc command: Select JDK bin/javadoc.exe.
Destination: The Path to save the generated document.
Click Finish to generate the document.
2. Select File> export from the menu ),
The remaining steps are the same as the first method.
3. Select the project for which you want to generate the document, and select from the menu,
Project-> Generate javadoc directly enters the javadoc generation dialog box. The remaining steps are the same as the first method in the javadoc generation dialog box.