Try removing the -Dsun.java2d.uiScale=3 option and let the JVM choose. On Fri, Oct 6, 2023 at 1:57 AM John Jason Jordan <[email protected]> wrote:
> 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' > >>> > >>> >
