Crashes when requiring `java.awt.Color` on headless openjdk install in GUI

[todbot]

Trying to use blink1.setColor(Color) crashes because java.awt.Color does not exist if you've installed headless OpenJDK on Linux (e.g. sudo apt install openjdk-17-jdk-headless) and run in a GUI.

~/projects/blink1-java$ ./run-example.sh Example1
Looking for blink(1) devices...
blink(1) found: serial:3972f61f version:299
Fading to purple
Setting to green
Exception in thread "main" java.lang.UnsatisfiedLinkError: Can't load library: /usr/lib/jvm/java-17-openjdk-arm64/lib/libawt_xawt.so
	at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2398)
	at java.base/java.lang.Runtime.load0(Runtime.java:755)
	at java.base/java.lang.System.load(System.java:1953)
	at java.base/jdk.internal.loader.NativeLibraries.load(Native Method)
       [...]
	at java.desktop/java.awt.Toolkit.<clinit>(Toolkit.java:1397)
	at java.desktop/java.awt.Color.<clinit>(Color.java:277)
	at com.thingm.blink1.Example1.main(Example1.java:32)

[todbot]

The "solution" such that it is is to pass -Djava.awt.headless=true when invoking Java.