Now ...
where do you want to go?

Presentations

OS/2 For You - Indexed by:

	Issue
	Date
	Title
	Category
	Author

SCOUG Resources & Information

OS/2 Trivia

Software, Demos, & Drivers

Java, Netscape updates

FixPaks

CD Index by:

	Title
	Category

Thanks

Credits

Overview

•   What is java
•   How does it work
•   Why is it important
•   What can it be used for
•   What can it not be used for
•   How to develop programs
•   Examples
•   What is its future
•   Questions
•   References

What is Java

•   object oriented programming language

    based on C++
    includes "standard" classes for application development
•   developed by Sun Microsystems
•   original intended use:

    implementation of embedded apps in consumer electronic devices
    (now being revisited with "Java" devices such as cards, rings, etc)
•   current status
•     JDK 1.0.2
•     JDK 1.1
•     JDK 1.2

How does it work

•   virtual machine
•   class-based
•   JIT compiler
•   security levels
•  class verification
•  loader
•  security manager

Why is it important

•   well-designed as a programming language
•   easily supports object oriented application development
•   standard classes provide diverse application support
•   platform independent

What can it be used for

•   standalone applications
•   applets
•     html based
•     viewer
•   standard classes support
•     GUI (AWT and Event classes)
•     Graphics
•     Multimedia
•     Streams
•       file io
•       object persistence
•     Network (tcpip sockets/URL connections)
•     Threads
•     Components (beans)
•     Remote methods (RMI)
•     Native methods
•   standard "extensions"
•     servlets
•     any extension classes based only on standard classes

What can it not be used for

•   cpu-intensive operations
•   host machine resource access
•   platform specific resources (JNI)

How to develop programs

•   JDK 1.0.2 (browser supported)
•   JDK 1.1.x (newer browsers: Netscape 4.0x, IE4)
•   Java IDEs
•     Java Workshop 2.0 (Sun)
•     VisualAge for Java (IBM)
•     JBuilder (Borland) (non-OS2)
•     Visual Cafe (Symantec) (non-OS2)
•     BeanMachine (Lotus)
•     Supercede (non-OS2)
•     NetBeans (OS/2)
•     Visual J++ (Microsoft)

Examples

•   applications
•   applets

What is its future

•   Many mainstream applications
•   Stronger component architecture
•   Basis for distributed processing without webserver

Questions

References

  many books

•     Java in a Nutshell (2nd edition)
•     Java Tutorial

Copyright 1998 the Southern California OS/2 User Group. ALL RIGHTS RESERVED.

OS/2, Workplace Shell, and IBM are registered trademarks of International Business Machines Corporation. All other trademarks remain the property of their respective owners.