The Java Platform, Standard Edition (SE), includes the Java Runtime Environment (JRE) and its encompassing Java Development Kit (JDK; see Chapter 10), the Java Programming Language, Java Virtual Machines (JVMs), tools/utilities, and the Java SE API libraries. A variety of platforms are available including Windows, macOS, Linux, and Solaris.
Java SE 9 API standard libraries are provided within packages (and modules). Each package is made up of classes and/or interfaces. An abbreviated list of commonly used packages is represented here to demonstrate the capabilities of the API. They are listed outside of the module ordering in JDK 9.
Java SE provides the JavaFX runtime libraries from Java SE 7 update 6 and JavaFX 2.2 onwards. JavaFX has replaced the Swing API as the primary client UI library for Java SE.
Language support: system/math methods, fundamental types, strings, threads, and exceptions
Annotation framework: metadata library support
Program instrumentation: agent services to instrument JVM programs
Dynamic Language Support: supported by core classes and VM
Java Management Extensions API: JVM monitoring and management
Module descriptors and configurations support
Reference-object classes: interaction support with the GC