My request is to implement DPI awareness for Launch4j.
Currently there are on the market retina notebooks with more than FullHd resolutions.
In this cases the Java applications looks very very small. I attach an image where you can see the brower in background and the Java application in the middle. The browser has much larger font, wich on a such a high resolution monitor looks fine, which the Java application is very very small, even if in the image is ok ( this is a kind of retina monitor ).
The fix is a flag in the exe file telling Windows that the application can handle this high resolution itself or not.
For most of the Java Swing application this should be false, and in this case Windows is doing an upscale of the graphics to 150%, 200%, etc.
See https://msdn.microsoft.com/en-us/library/ms701681(v=vs.85).aspx
Java Swing won't support HiDPI until Java 9:
http://openjdk.java.net/jeps/263
You could try the latest Java 9 beta, since JEP 263 status is already Closed / Delivered.