Ugly fonts Netbeans on Ubuntu 16.04

I have the same problem with Linux.

OS: Linux Mint 18 Cinnamon 3.0.7
Netbeans: 9.0-dev
Java: Oracle JDK 1.8.0.144

I change under the Neatbeans menu my Look&Feel.

Tools / Options /  Appearance / Look&Feel to GTK

In my netbeans conf file ($NETBEANS/etc/netbeans.conf) add this
under the varibale netbeans_default_options

-J-Dswing.aatext=true
-J-Dawt.useSystemAAFontSettings=gasp

I playing with the settings for Anti-aliasing. You can see following values from Java Runtime Environment fonts (https://wiki.archlinux.org/index.php/Java_Runtime_Environment_fonts)

I hope this help you.

Best regards

PS: This settings works for me only under Look&Feel with GTK.