SUCCESS!!
This command did the job:
PATH=/usr/java/jre1.8.0_381/bin/
followed by the launch script.
The above path is for Oracle Java 8 which I downloaded and installed
manually myself. I could probably just as easily have used openjdk17 or
Oracle 17, both of which are also installed, but with Oracle 8 JRE I
knew where it was and with the other two I'd have to figure it out.
Now my only question is, does that PATH command create a permanent
path, or will it go away, like after a reboot. Never mind. I just added
it to the launch script, which now says:
#!/bin/bash
cd /home/jjj/Software/TreeForm103/TreeForm/
PATH=/usr/java/jre1.8.0_381/bin/
java -Dsun.java2d.uiScale=3 -Xmx256m -Xms64m -jar TreeForm.jar
The program runs perfectly, except that the fonts are about 1mm. I can
still use the program because I know what the text says, even if I can
no longer really read it. I added the '-Dsun.java2d.uiScale=3,' which
was suggested to me as a way to increase the size of fonts, but in this
case it had no effect. The two -Xm... comments were in the original
launch scrip written by the developer. I don't know what they do, but
leaving them out makes no difference.
If anyone can suggest alternatives for the -Dsun... option to increase
font sizes in Java applications, I'd be happy to do some experimenting.
On Mon, 2 Oct 2023 13:35:05 -0700
John Jason Jordan <[email protected]> dijo:
> Exception in thread "main" java.lang.NoClassDefFoundError:
> sun.misc.Launcher at
> userInterface.Start.<clinit>(Start.java:54)
>
>I get the same error message whether I run from the launch script with
>its two options or straight from the command line without them.
>
>The only way I know how to tell what versions of Java are installed is
>to launch LibreOffice Writer and go to Tools > Options > Advanced,
>where it displays the versions of Java that LO found. It now lists
>Oracle 8, Oracle 17, and Debian 17, where it used to include Oracle 21
>as well. There's probably a faster, simpler way to get a list of
>installed Javas from the command line, but I don't know it. For testing
>it might also be useful if I could specify which of the installed Javas
>the app is supposed to use. As it is, it just picks one based on who
>knows what criteria.
>
>In Xubuntu it appears that the installed Javas include JB-Java-jdk8.d.
>On that the net leads me to openjdk8, and more links. The TreeForm app
>there just runs, and I can't tell what Java it's actually using.
>
>
>On Sun, 1 Oct 2023 10:32:59 -0700
>Michael Ewan <[email protected]> dijo:
>
>>Unfortunately it sounds like there is a static string in the Java
>>source or possibly in the jar file.
>>You can disassemble the jar file with the "jar" command from the Java
>>runtime.
>>
>>
>>On Sat, Sep 30, 2023 at 6:31 PM John Jason Jordan <[email protected]>
>>wrote:
>>
>>> I opened the launch script in a text editor and all it says is
>>>
>>> cd /home/jjj/Software/TreeForm103/TreeForm/
>>> java -Xmx256m -Xms64m -jar TreeForm.jar
>>>
>>> With the command line in ~/Software/TreeForm103/TreeForm I just
>>> copied the above line and ran it, and I got the same error message.
>>> Then I deleted the -Xm... options and ran it bare, and again I got
>>> the same error message. It might be useful to know what those
>>> options do. Window size, maybe? In any event, they don't seem
>>> related to the error message.
>>>
>>> Checking in Synaptic I have had OpenJDK installed the whole time. Is
>>> there a way to tell the java -jar command which java to use? As for
>>> paths, do you mean the path to the java? I know where the Oracle
>>> Java 8 is located, because there were 'install' instructions telling
>>> me to put it in /usr/java/jre1.8.0_381, so that's where I put it. It
>>> must be correct because LibreOffice found it and listed it as
>>> available. I don't know where the others are.
>>>
>>> There is a Help file with TreeForm, which says at the top:
>>>
>>> To install this software in your computer, unzip the folder
>>> in any folder of your choosing.
>>> This software requires Java 1.4.2 or higher to run. The Java
>>> runtime can be downloaded from the <link>Java
>>> Website.</link>
>>>
>>> Michael Ewan <[email protected]> dijo:
>>> >Your start script may be calling for a specific path rather than a
>>> >relative path in your JRE.
>>> >Also try using OpenJDK instead of Oracle Java. Do a text search in
>>> >your source code for that path.
>>>
>>> >> $ ./TreeForm_launch_script
>>> >> Error: could not open
>>> >> `/usr/lib/jvm/jdk-21-oracle-x64/lib/jvm.cfg'
>>>
>>>
