What can Java Technology do?

( http://docs.oracle.com/javase/tutorial/getStarted/intro/cando.html )


Java platform gives me the following feature:

Development Tools:
      the javac compiler
      the java launcher
      the javadoc documentation tools

Application Programming Interface (API)


Deployment Technologies:
      Java Web Start software
      Java Plug-in software

User Interface Toolkits:
      Swing
      Java 2D toolkits

Integration Libraries:
      Java IDL API
      JDBC API
      JNDI API
      Java RMI
      Java RMI-IIOP