This document is divided into two sections:

Java SE
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.
JDK
The Java Development Kit (JDK) APIs are specific to the JDK and will not necessarily be available in all implementations of the Java SE Platform. These APIs are in modules whose names start with jdk.
All Modules Java SE JDK Other Modules
Module Description
java.base

Defines the foundational APIs of the Java SE Platform.

java.compiler

Defines the Language Model, Annotation Processing, and Java Compiler APIs.

java.datatransfer

Defines the API for transferring data between and within applications.

java.desktop

Defines the AWT and Swing user interface toolkits, plus APIs for accessibility, audio, imaging, printing, and JavaBeans.

java.instrument

Defines services that allow agents to instrument programs running on the JVM.

java.logging

Defines the Java Logging API.

java.management

Defines the Java Management Extensions (JMX) API.

java.management.rmi

Defines the RMI connector for the Java Management Extensions (JMX) Remote API.

java.naming

Defines the Java Naming and Directory Interface (JNDI) API.

java.net.http

Defines the HTTP Client and WebSocket APIs.

java.prefs

Defines the Preferences API.

java.rmi

Defines the Remote Method Invocation (RMI) API.

java.scripting

Defines the Scripting API.

java.se

Defines the API of the Java SE Platform.

java.security.jgss

Defines the Java binding of the IETF Generic Security Services API (GSS-API).

java.security.sasl

Defines Java support for the IETF Simple Authentication and Security Layer (SASL).

java.smartcardio

Defines the Java Smart Card I/O API.

java.sql

Defines the JDBC API.

java.sql.rowset

Defines the JDBC RowSet API.

java.transaction.xa

Defines an API for supporting distributed transactions in JDBC.

java.xml

Defines the Java API for XML Processing (JAXP), the Streaming API for XML (StAX), the Simple API for XML (SAX), and the W3C Document Object Model (DOM) API.

java.xml.crypto

Defines the API for XML cryptography.

jdk.accessibility

Defines JDK utility classes used by implementors of Assistive Technologies.

jdk.attach

Defines the attach API.

jdk.charsets

Provides charsets that are not in java.base (mostly double byte and IBM charsets).

jdk.compiler

Defines the implementation of the system Java compiler and its command line equivalent, javac.

jdk.crypto.cryptoki

Provides the implementation of the SunPKCS11 security provider.

jdk.crypto.ec

Provides the implementation of the SunEC security provider.

jdk.dynalink

Defines the API for dynamic linking of high-level operations on objects.

jdk.editpad

Provides the implementation of the edit pad service used by jdk.jshell.

jdk.hotspot.agent

Defines the implementation of the HotSpot Serviceability Agent.

jdk.httpserver

Defines the JDK-specific HTTP server API.

jdk.jartool

Defines tools for manipulating Java Archive (JAR) files, including the jar and jarsigner tools.

jdk.javadoc

Defines the implementation of the system documentation tool and its command line equivalent, javadoc.

jdk.jcmd

Defines tools for diagnostics and troubleshooting a JVM such as the jcmd, jps, jstat tools.

jdk.jconsole

Defines the JMX graphical tool, jconsole, for monitoring and managing a running application.

jdk.jdeps

Defines tools for analysing dependencies in Java libraries and programs, including the jdeps, javap, and jdeprscan tools.

jdk.jdi

Defines the Java Debug Interface.

jdk.jdwp.agent

Provides the implementation of the Java Debug Wire Protocol (JDWP) agent.

jdk.jfr

Defines the API for JDK Flight Recorder.

jdk.jlink

Defines the jlink tool for creating run-time images, the jmod tool for creating and manipulating JMOD files, and the jimage tool for inspecting the JDK implementation-specific container file for classes and resources.

jdk.jshell

This module provides support for Java Programming Language 'snippet' evaluating tools, such as Read-Eval-Print Loops (REPLs), including the jshell tool.

jdk.jsobject

Defines the API for the JavaScript Object.

jdk.jstatd

Defines the jstatd tool for starting a daemon for the jstat tool to monitor JVM statistics remotely.

jdk.localedata

Provides the locale data for locales other than US locale.

jdk.management

Defines JDK-specific management interfaces for the JVM.

jdk.management.agent

Defines the JMX management agent.

jdk.management.jfr

Defines the Management Interface for JDK Flight Recorder.

jdk.naming.dns

Provides the implementation of the DNS Java Naming provider.

jdk.naming.ldap

Provides the implementation of the LDAP DNS provider.

jdk.naming.rmi

Provides the implementation of the RMI Java Naming provider.

jdk.net

Defines the JDK-specific Networking API.

jdk.pack

Defines tools for transforming a JAR file into a compressed pack200 file and transforming a packed file into a JAR file, including the pack200 and unpack200 tools.

jdk.rmic

Defines the rmic compiler for generating stubs and skeletons using the Java Remote Method Protocol (JRMP) for remote objects.

jdk.scripting.nashorn

Provides the implementation of Nashorn script engine and the runtime environment for programs written in ECMAScript 5.1.

jdk.sctp

Defines the JDK-specific API for SCTP.

jdk.security.auth

Provides implementations of the javax.security.auth.* interfaces and various authentication modules.

jdk.security.jgss

Defines JDK extensions to the GSS-API and an implementation of the SASL GSSAPI mechanism.

jdk.xml.dom

Defines the subset of the W3C Document Object Model (DOM) API that is not part of the Java SE API.

jdk.zipfs

Provides the implementation of the zip file system provider.