There is a difference in rendering when the app is launched:

1) java -Dprism.order=sw -jar Calculator.jar
2) java -Dprism.order=d3d,es2,es1 -jar Calculator.jar

Look at the attached screenshots.

To reproduce download ga-samples from http://jre.us.oracle.com/java/re/javafx/8.0/promoted/latest/bundles/windows-x64/.