JAVA SE 16-API Ref

The Java Platform, Standard Edition (Java SE) APIs define the core Java platform for general-purpose computing. These APIs are in modules whose names start with java.
This API (Application Programming Interface) document has pages corresponding to the items in the navigation bar, described as follows.
The Overview page is the front page of this API document and provides a list of all modules with a summary for each. This page can also contain an overall description of the set of modules.