--- old/make/CompileDemos.gmk	2018-05-11 11:34:45.000000000 -0700
+++ new/make/CompileDemos.gmk	2018-05-11 11:34:45.000000000 -0700
@@ -253,6 +253,12 @@
     DEMO_SUBDIR := jfc, \
 ))
 
+$(eval $(call SetupBuildDemo, J2Ddemo, \
+    DEMO_SUBDIR := jfc, \
+    MAIN_CLASS := java2d.J2Ddemo, \
+    JAR_NAME := J2Ddemo, \
+))
+
 $(eval $(call SetupBuildDemo, Metalworks, \
     DEMO_SUBDIR := jfc, \
 ))