LibreOffice extension (fixed, update java to 17)

1

I posted a previous topic about the extension not working in LibreOffice, i debugged it and found the error to be:

java.lang.NoClassDefFoundError: Could not initialize class com.sun.java.swing.plaf.gtk.GTKLookAndFeel
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:398)
        at java.desktop/javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:2036)
        at java.desktop/javax.swing.UIManager.setLookAndFeel(UIManager.java:632)
        at org.languagetool.openoffice.MultiDocumentsHandler.setJavaLookAndFeel(MultiDocumentsHandler.java:1464)
        at org.languagetool.openoffice.MultiDocumentsHandler.getCheckResults(MultiDocumentsHandler.java:179)
        at org.languagetool.openoffice.MultiDocumentsHandler.doProofreading(MultiDocumentsHandler.java:165)
        at org.languagetool.openoffice.Main.doProofreading(Main.java:81)

I was running OpenJDK 11, it should have swing but maybe not? Or it’s trying to dynamically load /usr/lib64/libgtk-x11-2.0.so and not finding it.

Anyhow, the solution I found to work was to download JDK 17 from Oracle and set that as the jvm in LibreOffice settings. Now the extension seems to work properly.

1 Like
2

Hi,
The same happened to me and then I installed JDK 17 from Oracle:
ricardo@rjlima:~$ java --version
java 17.0.2 2022-01-18 LTS
Java™ SE Runtime Environment (build 17.0.2+8-LTS-86)
Java HotSpot™ 64-Bit Server VM (build 17.0.2+8-LTS-86, mixed mode, sharing)

In LO, I have gone to Options, Advanced and marked JDK 17.

But now a screen error appears, and I don’t know what to do with it, it’s attached.
My LO version is 6.4

Captura de tela de 2022-02-02 14-42-58
Captura de tela de 2022-02-02 14-42-58739×592 101 KB

3

Do these hints help, maybe? Linux-specific issues : LanguageTool

4

Thanks @dnaber ! The first hint was enough to fix it. LO crashed once, then restarted, and LT is already on.

5

Hello,
I am on Manjaro and have another problem. Libreoffice with LT extension installed freezes after some time. I checked my Java settings in Libreoffice: 17.0.1 version installed. Any help?