Application Programming Interface (API)

• The Application Programming Interface comes with the Java compiler.
• It provides routine software.
• Java API includes:
  • java.lang: Base language types
  • java.io: Streams and random-access files, standard I/O
  • java.net: Sockets, telnet interfaces, and URLs
  • java.util: container and utility classes
  • java.awt--an Abstract Windowing Toolkit
• It is not part of the "language" definition, but almost so.
• It is a family of classes.
• User programs are subclasses of the API.
• User programs can instantiate objects from the API classes.
• It includes things like windows and scrollbars and mathematical operations.