Caméléon

Hello Tropically, I've had the same problem when I where using openjdk, now I'm running Ubuntu 18.04 64bit with java-8-oracle and the problem is gone. Here's the link of it: http://www.webupd8.org/2012/09/install-oracle-java-8-in-ubuntu-via-ppa.html you will find instruction on how to instal it on ubuntu / linux mint via a PPA repository. The PPA support JDK8 for both 32bit and 64bit as well as ARM. But to resume it's the three commands lines bellow sudo add-apt-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install oracle-java8-installer Then run TechnicLauncher.jar with Oracle Java 8 Runtime and it should work. In hope it will help you.