*             クラス名が{@literal null}または空文字列だった場合
     * @throws ClassNotFoundRuntimeException
     *             {@link ClassNotFoundException}がおきた場合
     * @see #forName(String)
     */
    public static Class<?> convertClass(final String className) throws ClassNotFoundRuntimeException {
        assertArgumentNotEmpty("className", className);
        final Class<?> clazz = primitiveNameToClassMap.get(className);
        if (clazz != null) {