Java 9

[willrogers]

There are a few tweaks for Java 9, most of which I have done.

There's only one problem I can find: com.sun.javafx.tk.FontMetrics has removed its computeStringWidth(String) method in favour of getCharWidth(char). It might be possible to do the same thing by simply summing the widths of the characters in the string.

This is relevant in GraphicsUtils.java.

[kasemir]

Note that all the display builder Java 9 changes are already in the phoebus version.
The basic problem is that you can't do this type of JavaFX code for both Java 8 and Java 9.

[willrogers]

Sure - you can merge this (or not) at the time of your choice, probably once CS-Studio is fully moved across to Java 9 so there's no reason to keep this on Java 8.