return new Future<O>() {

      @Override
      public boolean cancel(boolean mayInterruptIfRunning) {
        return input.cancel(mayInterruptIfRunning);
      }

      @Override
      public boolean isCancelled() {
        return input.isCancelled();
      }

      @Override
      public boolean isDone() {
        return input.isDone();
      }

      @Override

   * between {@code 'a'} and {@code 'z'} inclusive. All others (including non-ASCII characters)
   * return {@code false}.
   */
  public static boolean isLowerCase(char c) {
    // Note: This was benchmarked against the alternate expression "(char)(c - 'a') < 26" (Nov '13)
    // and found to perform at least as well, or better.
    return (c >= 'a') && (c <= 'z');
  }

    public int size() {
      return end - start;
    }

    @Override
    public boolean isEmpty() {
      return false;
    }

    @Override
    public Float get(int index) {
      checkElementIndex(index, size());
      return array[start + index];
    }

    @Override
    public boolean contains(@CheckForNull Object target) {
      // Overridden to prevent a ton of boxing

   *
   * <p><b>Java 8+ users:</b> use {@link Double#isFinite(double)} instead.
   *
   * @since 10.0
   */
  public static boolean isFinite(double value) {
    return NEGATIVE_INFINITY < value && value < POSITIVE_INFINITY;
  }

  /**
   * Returns {@code true} if {@code target} is present as an element anywhere in {@code array}. Note

    public int size() {
      return end - start;
    }

    @Override
    public boolean isEmpty() {
      return false;
    }

    @Override
    public Float get(int index) {
      checkElementIndex(index, size());
      return array[start + index];
    }

    @Override
    public boolean contains(@CheckForNull Object target) {
      // Overridden to prevent a ton of boxing

    (double) Long.MAX_VALUE,
    Double.MAX_VALUE,
    Double.POSITIVE_INFINITY,
    Double.NaN,
    Float.MAX_VALUE,
  };

  /** The notion of equality used by AtomicDoubleArray */
  static boolean bitEquals(double x, double y) {
    return Double.doubleToRawLongBits(x) == Double.doubleToRawLongBits(y);
  }

  static void assertBitEquals(double x, double y) {

        int.class,
        Integer.class,
        long.class,
        Long.class,
        short.class,
        Short.class,
        byte.class,
        Byte.class,
        boolean.class,
        Boolean.class,
        char.class,
        Character.class,
        int[].class,
        Object[].class,
        UnsignedInteger.class,
        UnsignedLong.class,
        BigInteger.class,

        assertEquals(24L, MemoryUtil.sizeOf(Float.MAX_VALUE));
        assertEquals(24L, MemoryUtil.sizeOf(Double.MAX_VALUE));
        assertEquals(24L, MemoryUtil.sizeOf(Byte.MAX_VALUE));
        assertEquals(16L, MemoryUtil.sizeOf(Boolean.TRUE));
        assertEquals(32L, MemoryUtil.sizeOf(new Date()));
        assertEquals(80L, MemoryUtil.sizeOf(LocalDateTime.now()));
        assertEquals(2128L, MemoryUtil.sizeOf(ZonedDateTime.now()));

  }

  private static class UnmarkableInputStream extends InputStream {
    @Override
    public int read() throws IOException {
      return 0;
    }

    @Override
    public boolean markSupported() {
      return false;
    }
  }

   * here would have no significance to end users, who would be forced to conform to the signature
   * used in FilenameFilter.)
   */
  @Override
  public boolean accept(File dir, String fileName) {
    return pattern.matcher(fileName).matches();
  }