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

Chapter 5 147

Internet and Interoperability

MPE/IX Software Developer’s Kit (SDK) for Java, Version 1.2.2

/usr/local/java/latest/bin as the location for executable programs.

Further subdivision has happened in the libraries hierarchy; there is now a /classic

subdirectory where the executable library (XL) containing most JVM functionality resides.

This is in preparation for supporting multiple Java Virtual Machines running in the same

directory hierarchy in a future release.

Certain command line options to Java that have been supported in previous releases are

actually nonstandard, and not guaranteed to be available on all VM implementations. To

help identify such nonstandard options, they now must be preﬁxed by –X. As an example,

the –verbose option is standard, and thus is speciﬁed as –verbose on both 1.1.x and 1.2.x

versions. –nojit is nonstandard, so –nojit works on the 1.1.x releases, but must be speciﬁed

as –Xnojit on 1.2.x releases. Typing java with no options or ﬁlenames causes a list of

standard options to be printed. Typing java –X causes a list of nonstandard options to be

printed.

Releases prior to JDK 1.1.7 included a JAVAUDC UDC ﬁle in PUB.JAVA. In JDK 1.1.7, the

UDC ﬁle was replaced by two command ﬁles in PUB.SYS: JAVA (to invoke the JVM) and

JAVAC (to invoke the javac compiler).

If you have previously installed a web download version of JAVA 2 on your HP 3000, the

installation will have created command ﬁles named JAVA2 and JAVA2C in PUB.SYS. With

SDK 1.2.2, these ﬁles are no longer required and you can purge them. The JAVA and JAVAC

command ﬁles distributed with this release will work correctly with both older JDK1.1.x

versions of Java, and newer 1.2.x versions.