本文分为三个部分： 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. JavaFX The JavaFX APIs define a set of user-interface controls, graphics, media, and web packages for developing rich client applications. These APIs are in modules whose names start with javafx.