--- a/src/jdk.jpackage/share/classes/jdk/jpackage/internal/resources/MainResources.properties	Wed Sep 25 17:36:28 2019 -0400
+++ b/src/jdk.jpackage/share/classes/jdk/jpackage/internal/resources/MainResources.properties	Thu Sep 26 09:19:46 2019 -0400
@@ -28,6 +28,7 @@
 param.description.default=None
 param.vendor.default=Unknown
 
+warning.experimental=WARNING: Using experimental tool jpackage
 message.using-default-resource=Using default package resource {0} {1} (add {2} to the resource-dir to customize).
 message.no-default-resource=no default package resource {0} {1} (add {2} to the resource-dir to customize).
 message.using-custom-resource-from-file=Using custom package resource {0} (loaded from file {1}).