How I fixed Ubuntu Java blank / colored windows
Problem
On a libvirt
VM running Ubuntu, you see blank or colored windows when running Java applications. In my case, the windows were pink and yellow but didnt’t show any content.
Solution
In my case, I had openjdk-11-jre
installed. This is an extremely old version for Ubuntu 24.04, so:
sudo apt purge openjdk-11-jre
sudo apt install default-jre
In our case, default-jre
is OpenJDK 21 aka openjdk-21-jre
.
After that, I restarted the Java application and it ran fine.
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