--- a/src/jdk.jpackage/share/classes/jdk/jpackage/internal/StandardBundlerParam.java	Thu Jun 06 19:18:09 2019 -0400
+++ b/src/jdk.jpackage/share/classes/jdk/jpackage/internal/StandardBundlerParam.java	Thu Jun 06 19:21:05 2019 -0400
@@ -141,7 +141,7 @@
                         String cp = (String) params.get("classpath");
                         return cp == null ? "" : cp;
                     },
-                    (s, p) -> s.replace(File.pathSeparator, " ")
+                    (s, p) -> s
             );
 
     static final StandardBundlerParam<String> MAIN_CLASS =