src/java.base/share/classes/jdk/internal/reflect/AccessorGenerator.java

*** 418,428 ****
              throw new InternalError("Should have found primitive type");
          } else if (c.isArray()) {
              return "[" + getClassName(c.getComponentType(), true);
          } else {
              if (addPrefixAndSuffixForNonPrimitiveTypes) {
!                 return internalize("L" + c.getName() + ";");
              } else {
                  return internalize(c.getName());
              }
          }
      }
--- 418,432 ----
              throw new InternalError("Should have found primitive type");
          } else if (c.isArray()) {
              return "[" + getClassName(c.getComponentType(), true);
          } else {
              if (addPrefixAndSuffixForNonPrimitiveTypes) {
!                 if (unsafe.isValueType(c)) {
!                     return internalize('Q' + c.getName() + ";");
!                 } else {
!                     return internalize('L' + c.getName() + ";");
!                 }
              } else {
                  return internalize(c.getName());
              }
          }
      }