src/jdk.jartool/share/classes/sun/tools/jar/Main.java

*** 697,707 ****
              }
              name = name.substring(i + 1, name.length());
          }
          String pn = toPackageName(name);
          // add if this is a class or resource in a package
!         if (Checks.isJavaIdentifier(pn)) {
              packages.add(pn);
          }
      }
  
      private String toEntryName(String name, Set<String> cpaths, boolean isDir) {
--- 697,707 ----
              }
              name = name.substring(i + 1, name.length());
          }
          String pn = toPackageName(name);
          // add if this is a class or resource in a package
!         if (Checks.isPackageName(pn)) {
              packages.add(pn);
          }
      }
  
      private String toEntryName(String name, Set<String> cpaths, boolean isDir) {
*** 1993,2003 ****
              } else {
                  system = ModuleFinder.ofSystem();
              }
              // get a resolved module graph
              Configuration config =
!                 Configuration.empty().resolveRequires(system, finder, roots);
  
              // filter modules resolved from the system module finder
              this.modules = config.modules().stream()
                  .map(ResolvedModule::name)
                  .filter(mn -> roots.contains(mn) && !system.find(mn).isPresent())
--- 1993,2003 ----
              } else {
                  system = ModuleFinder.ofSystem();
              }
              // get a resolved module graph
              Configuration config =
!                 Configuration.empty().resolve(system, finder, roots);
  
              // filter modules resolved from the system module finder
              this.modules = config.modules().stream()
                  .map(ResolvedModule::name)
                  .filter(mn -> roots.contains(mn) && !system.find(mn).isPresent())