I am currently working on extending a Java class library for

[Mike Cowlishaw-2]

First, check that the class can be seen by Java, using javap:

   javap  CustomObject

It probably cannot: possible reasons are:

  a) It's in a package, in which case is should be in a directory that matches
the package and rooted from a segment in the CLASSPATH (e.g., if the package is
foo.bar, then perhaps in \java11\classes\foo\bar)

 b) It's not in a package but CLASSPATH does not include the current directory
(".").

Mike Cowlishaw, IBM Fellow, IBM UK Laboratories
mailto:[hidden email]   [http://www2.hursley.ibm.com]
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[Massimiliano Marsiglietti]

There's something horribly wrong with OS/2's java 1.1.4.

I was experiencing weirdnesses much like the one described
some messages ago (a class not found), but this problem
probably is different. I have a NetRexx program that generates other
NetRexx and Java programs: under OS/2, when it invokes javac it produces a
bad .class file, that from there on cannot be  seen by Java. An attempt to
look at it with javap gives:

Error: Class not found in '.\.\nrio\reg.class'
Error: bad class format.\.\nrio\reg.classwrong magic: 1772114341, expected
-8892 75714

Repeated ad libitum (until I press CTRL+C). Now the weird thing is, this
doesn't happen under Linux and/or Windows 95.

The interesting part of the problem comes from the fact that if I compile
by issueing javac on the very same .java file, the .class is produced well
and  it can be seen, used and perused by other Java classes.

There are other general weirdnesses in the current JDK 1.1.4: I don't know
why, but my DBF/QIF to MBase import routines tend to fail when run under
OS/2 (same classes, same DBs, same computer but different o.s. make it
work as expected, and as it should). These are NetRexx classes, but I am
sure that if I rewrote everything in Java-Java the final outcome would be
the very same. The programmer's 6th sense.

Finally, I had to put every List in Panels, instead that directly into a
Frame, because if :
A) a program is grown over a certain size,
and
B) you put a List into a Frame,

your program bombs. All of the above with and without JIT, with and
without latest Java refresh.

Bottom line: the thing is fast (possibly the fastest I've seen), but
unreliable. [I am sure it will improve, though]

Max

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[mcbrides]

>There's something horribly wrong with OS/2's java 1.1.4.
>

Max, is this the 01/21/98 update that you're running? Also, which version
of OS/2, 3.0 or 4.0?

I've had such bad luck with this update drop, that I've back leveled to the
previous one dated 12/05/97. The older one is slower, no doubt about it, but
at least things run to completeion and no PM corruption.

>Bottom line: the thing is fast (possibly the fastest I've seen), but
>unreliable. [I am sure it will improve, though]
>

Agreed. I'm anxious for the speed improvment. So much so, I "mixed and matched"
some of the modules from the 012198 drop with the 120597 drop... No real luck
to report. However, (no recommendations here) using the 12/05 version of
JAVAI.DLL in the 01/21 update allows it to run on my machine...

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| Jerry McBride                       |
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[Massimiliano Marsiglietti]

  Ciao,

  > >There's something horribly wrong with OS/2's java 1.1.4.
  > >
  >
  > Max, is this the 01/21/98 update that you're running? Also, which
  > version of OS/2, 3.0 or 4.0?

  Yes, it's the 21/1/98, OS/2 4.0 not fixpak-ed.

  > Agreed. I'm anxious for the speed improvment. So much so, I "mixed
  > and matched" some of the modules from the 012198 drop with the >
  120597 drop... No real luck to report. However, (no recommendations
  > here) using the 12/05 version of JAVAI.DLL in the 01/21 update >
  allows it to run on my machine...

  I'd like to correct the aim of my previous post: I was only implying
  that if something fails when it shouldn't, well if it is
  OS/2-related it could be because of this weird JVM.

  Max
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