* @throws ClassNotFoundRuntimeException
     *             クラスが見つからなかった場合
     * @see Class#forName(String, boolean, ClassLoader)
     */
    public static <T> Class<T> forName(final String className) throws ClassNotFoundRuntimeException {
        assertArgumentNotEmpty("className", className);

        return forName(className, Thread.currentThread().getContextClassLoader());
    }

    /**

  public static final Charset US_ASCII = Charset.forName("US-ASCII");

  /**
   * ISO-8859-1: ISO Latin Alphabet Number 1 (ISO-LATIN-1).
   *
   * <p><b>Java 7+ users:</b> this constant should be treated as deprecated; use {@link
   * java.nio.charset.StandardCharsets#ISO_8859_1} instead.
   *
   */
  public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");

  /**

  public static final Charset US_ASCII = Charset.forName("US-ASCII");

  /**
   * ISO-8859-1: ISO Latin Alphabet Number 1 (ISO-LATIN-1).
   *
   * <p><b>Java 7+ users:</b> this constant should be treated as deprecated; use {@link
   * java.nio.charset.StandardCharsets#ISO_8859_1} instead.
   *
   */
  public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");

  /**

    private final int bufferSize;

    private final Consumer<String> outputCallback;

    @Deprecated
    public InputStreamThread(final InputStream is, final String charset) {
        this(is, Charset.forName(charset), MAX_BUFFER_SIZE, null);
    }

    public InputStreamThread(final InputStream is, final Charset charset, final int bufferSize, final Consumer<String> outputCallback) {
        super("InputStreamThread");

        shutdownCommonsHttpClient();
    }

    private void shutdownCommonsHttpClient() { // from Tomcat7ConfigServlet (old class)
        try {
            final Class<?> clazz = Class.forName("org.apache.commons.httpclient.MultiThreadedHttpConnectionManager");
            final Method method = clazz.getMethod("shutdownAll", (Class<?>[]) null);
            method.invoke(null, (Object[]) null);

 *
 * @author shinsuke
 *
 */
public class CoreLibConstants {

    /**
     * UTF-8
     */
    public static final String UTF_8 = "UTF-8";

    public static final Charset CHARSET_UTF_8 = Charset.forName(UTF_8);

    public static final String DATE_FORMAT_ISO_8601_BASIC = "yyyyMMdd'T'HHmmss.SSSZ";

    public static final String DATE_FORMAT_ISO_8601_EXTEND = "yyyy-MM-dd'T'HH:mm:ss.SSSZ";

  }

  private static boolean unsafeComparatorAvailable() {
    // See Java Puzzler #44
    // Use reflection instead of catching NoClassDefFoundError
    try {
      Class.forName(unsafeComparatorClassName());
      return true;
    } catch (Error | ClassNotFoundException tolerable) {
      /*
       * We're probably running on Android.
       *
       * A note on exception types:

    public static final String HOGE = "hoge";

    /**
     * @throws Exception
     */
    @Test(expected = EmptyArgumentException.class)
    public void testForName_EmptyName() throws Exception {
        ClassUtil.forName("");
    }

    /**
     * @throws Exception
     */
    @Test(expected = EmptyArgumentException.class)
    public void testGetField_EmptyName() throws Exception {
        ClassUtil.getField(getClass(), "");

  }

  private static boolean unsafeComparatorAvailable() {
    // See Java Puzzler #44
    // Use reflection instead of catching NoClassDefFoundError
    try {
      Class.forName(unsafeComparatorClassName());
      return true;
    } catch (Error | ClassNotFoundException tolerable) {
      /*
       * We're probably running on Android.
       *
       * A note on exception types:

     */
    public static void registerDriver(final String driverClassName) {
        assertArgumentNotEmpty("driverClassName", driverClassName);

        final Class<Driver> clazz = ClassUtil.forName(driverClassName);
        registerDriver(clazz);
    }

    /**
     * JDBCドライバを登録します。
     *
     * @param driverClass
     *            登録するJDBCドライバのクラス。{@literal null}であってはいけません
     */