src/java.base/share/classes/sun/reflect/generics/reflectiveObjects/ParameterizedTypeImpl.java

*** 210,228 ****
              if (ownerType instanceof Class)
                  sb.append(((Class)ownerType).getName());
              else
                  sb.append(ownerType.toString());
  
!             sb.append(".");
  
              if (ownerType instanceof ParameterizedTypeImpl) {
                  // Find simple name of nested type by removing the
                  // shared prefix with owner.
                  sb.append(rawType.getName().replace( ((ParameterizedTypeImpl)ownerType).rawType.getName() + "$",
                                           ""));
              } else
!                 sb.append(rawType.getName());
          } else
              sb.append(rawType.getName());
  
          if (actualTypeArguments != null &&
              actualTypeArguments.length > 0) {
--- 210,228 ----
              if (ownerType instanceof Class)
                  sb.append(((Class)ownerType).getName());
              else
                  sb.append(ownerType.toString());
  
!             sb.append("$");
  
              if (ownerType instanceof ParameterizedTypeImpl) {
                  // Find simple name of nested type by removing the
                  // shared prefix with owner.
                  sb.append(rawType.getName().replace( ((ParameterizedTypeImpl)ownerType).rawType.getName() + "$",
                                           ""));
              } else
!                 sb.append(rawType.getName().replace(ownerType.getTypeName() + "$", ""));
          } else
              sb.append(rawType.getName());
  
          if (actualTypeArguments != null &&
              actualTypeArguments.length > 0) {