src/jdk.jpackage/share/classes/jdk/jpackage/internal/Arguments.java

@@ -459,11 +459,11 @@
             // display error for arguments that are not supported
             // for current configuration.
 
             validateArguments();
 
-            addResources(deployParams, input);
+            addResources(deployParams, input, mainJarPath);
 
             List<Map<String, ? super Object>> launchersAsMap =
                     new ArrayList<>();
 
             for (AddLauncherArguments sl : addLaunchers) {

@@ -645,11 +645,11 @@
             }
         }
     }
 
     private void addResources(DeployParams deployParams,
-            String inputdir) throws PackagerException {
+            String inputdir, String mainJar) throws PackagerException {
 
         if (inputdir == null || inputdir.isEmpty()) {
             return;
         }
 

@@ -670,11 +670,11 @@
         } catch (IOException e) {
             Log.error("Unable to add resources: " + e.getMessage());
         }
         fileNames.forEach(file -> deployParams.addResource(baseDir, file));
 
-        deployParams.setClasspath();
+        deployParams.setClasspath(mainJar);
     }
 
     static CLIOptions toCLIOption(String arg) {
         CLIOptions option;
         if ((option = argIds.get(arg)) == null) {