modules/fxpackager/src/test/java/hello/TestPackager.java

@@ -170,8 +170,13 @@
 
     public static void main(String[] args) {
         TestPackager.args = args;
         //Schedule a job for the event-dispatching thread:
         //creating and showing this application's GUI.
-        javax.swing.SwingUtilities.invokeLater(TestPackager::createAndShowGUI);
+                try {
+                        javax.swing.SwingUtilities.invokeAndWait(TestPackager::createAndShowGUI);
+                }
+                catch (Exception e) {
+                        e.printStackTrace();
+                }
     }
 }