Hi,
I’ve been browsing for a while trying to get openJDK version 9 installer 
Can anybody please share the .deb file for Ubuntu
I found a tar.gz version
I tried to “install” from version archive .tar.gz. It Iooks like symbolic links works but the designer is not scaling correctly in 2560x1600 resolution. Maybe I didn’t get the actual version 9
EDIT": Found it at Archived OpenJDK GA Releases (java.net)
The native launcher on 7.9 uses JDK 9, so you can just use that instead.
It looks like you’re maybe using a high DPI Setup, and I’m not sure the Linux version scales correctly or automatically on high DPI unless you manually add the JVM argument -Dsun.java2d.uiScale=2.0.
No, it would have to be added to the launcher somehow… but now I can’t remember if the 7.9 launchers had that kind of config option.
I’ve been trying to find out, not luck yet
In ~/.ignition/clientlauncher-data there should be a launch.xml file with a key:
<jvm-args></jvm-args>
edit that to be:
<jvm-args>-Dsun.java2d.uiScale=2.0</jvm-args>
See if that does anything after closing/opening the launcher and launching a new Designer or Client.
Perfect, that did the trick.