Index: /applications/editors/josm/plugins/build-common.xml
===================================================================
--- /applications/editors/josm/plugins/build-common.xml	(revision 33422)
+++ /applications/editors/josm/plugins/build-common.xml	(revision 33423)
@@ -36,5 +36,5 @@
     <!-- For Java9-specific stuff -->
     <condition property="isJava9">
-        <equals arg1="${ant.java.version}" arg2="1.9" />
+        <matches string="${ant.java.version}" pattern="(1.)?9" />
     </condition>
     <target name="-jaxb_before9" unless="isJava9">