hi tonton, this bug was fixed a long time ago (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895885), but unfortunately did not make it in for bionic :-(
You can do two things: 1. Install openjdk-9-jdk and choose it (use sudo update-java- alternatives --list/--set ... or set JAVA_HOME) 2. use the upstream .deb: https://sourceforge.net/projects/freeplane/files/freeplane%20stable/freeplane_1.6.15%7Eupstream-1_all.deb/download --> download and simply install with "sudo dpkg -i freeplane_1.6.15~upstream-1_all.deb" Cheers and Best Regards, Felix ** Bug watch added: Debian Bug tracker #895885 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895885 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800147 Title: freeplane didn't show interface To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/freeplane/+bug/1800147/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs