src/java.base/share/classes/jdk/internal/module/Modules.java

*** 80,91 ****
       */
      public static Module defineModule(ClassLoader loader,
                                        String name,
                                        Set<String> packages)
      {
!         ModuleDescriptor descriptor = ModuleDescriptor.module(name)
!                 .contains(packages)
                  .build();
  
          return JLRMA.defineModule(loader, descriptor, null);
      }
  
--- 80,91 ----
       */
      public static Module defineModule(ClassLoader loader,
                                        String name,
                                        Set<String> packages)
      {
!         ModuleDescriptor descriptor = ModuleDescriptor.newModule(name)
!                 .packages(packages)
                  .build();
  
          return JLRMA.defineModule(loader, descriptor, null);
      }
  
*** 183,193 ****
      }
  
      /**
       * Adds a package to a module's content.
       *
!      * This method is a no-op if the module already contains the package.
       */
      public static void addPackage(Module m, String pn) {
          JLRMA.addPackage(m, pn);
      }
  
--- 183,194 ----
      }
  
      /**
       * Adds a package to a module's content.
       *
!      * This method is a no-op if the module already contains the package or the
!      * module is an unnamed module.
       */
      public static void addPackage(Module m, String pn) {
          JLRMA.addPackage(m, pn);
      }