Communicator e3000 MPE/iX Release 6.5 (Non-Platform Software Release C.65.00 (30216-90291)

146 Chapter5
Internet and Interoperability
MPE/IX Software Developer’s Kit (SDK) for Java, Version 1.2.2
MPE/IX Software Developer’s Kit (SDK) for Java, Version
1.2.2
by Mike Yawn,
Commercial Systems Division
A major new release of Java, Version 1.2.2, is included with this release of MPE/iX. This
article briefly describes some of the changes. One change is the name; the former Java
Developer’s Kit (JDK) is now called the Software Developer’s Kit (SDK) for Java. You will
also find in the literature that SDK 1.2 is frequently referred to as the Java 2 Platform.
This is done merely to emphasize the large increase in functionality over JDK 1.1.x (which
was presumably, although not explicitly, the Java 1 Platform). The Java 2 Platform does
not indicate an SDK version of 2.0. Feel free to be confused by this.
This article does not attempt to cover all the new features of SDK 1.2, of which there are
hundreds. Instead, it covers a small number of changes that are visible to the casual user.
Programmers wishing to take advantage of all the new APIs and features can obtain a list
at new features in the Java 2 platform at
http://java.sun.com/products/jdk/1.2/docs/relnotes/features.html.
Users just getting started with Java and wanting to learn the language may want to
reference the tutorial at http://java.sun.com/docs/books/tutorial/index.html.
HTML format documentation was previously included as part of the JDK release. Because
of the amount of disk space consumed by these files, they are now separately downloadable
and installable from CSY’s Jazz web server. As a result, you have the option of not
installing the files at all, or of installing them on a different system if you do not run web
server software on your HP 3000. The files can be downloaded from
http://jazz.external.hp.com/src/java. Navigate to the JDK 1.2 download page and
select the HTML Documentation Files package. You can also browse the documentation
on-line at http://java.sun.com/products/jdk/1.2/docs/index.html.
Previous versions of Java delivered for the HP 3000 included a Motif implementation of
the Abstract Windowing Toolkit (AWT). The files comprising the AWT consumed a large
amount of disk space, and feedback indicated that few users found the Motif
implementation useful. We have discontinued distributing the AWT as part of our Java
offering. For applications that require AWT functionality, the Remote AWT for Java
technology from IBM can be used to allow graphical applications running on the HP 3000
to have their graphical displays redirected to a client system that also runs the Remote
AWT software. The Remote AWT software is available at no charge from
http://www.alphaworks.ibm.com/tech/remoteawtforjava.
As with previous Java versions, you must stream JINSTJDK.INSTALL.JAVA to actually
install the SDK on your system.
One minor but noticeable change in this release is in the directory structures for the Java
product. The top level directory is still /usr/local/java/<version>/, with <version>
being jdk1.2.2 in this release. As in previous releases, there are subdirectories /bin and /lib
at this level, containing binaries and libraries, respectively. New at this level is a /jre (for
Java Runtime Environment) subdirectory, which is also subdivided into /bin and /lib
subdirectories. This change is transparent to users, who should still use