When I originally installed Apache NetBeans 10 I was using JDK 8 (1.8.0_201) and the GUI looked fine.
I got NetBeans 10 for the purpose of working with Java 11, however after installing JDK 11 (11.0.2), the NetBeans GUI became bigger and blurry, and I don't know why?
Loading Menu Bigger and Blurry with JDK 11
IDE buttons and images blurry with JDK 11
I will also note that this also happens with my swing programs I was developing in Java, once Java JDK 11 was installed all the buttons in the programs became bigger, and the images became blurry.