public static char[] bytes2Chars(final byte[] bytes) {
        if (bytes == null) return null;
        int len = bytes.length;
        if (len <= 0) return null;
        char[] chars = new char[len];
        for (int i = 0; i < len; i++) {
            chars[i] = (char) (bytes[i] & 0xff);
        }
        return chars;
    }
@Test
    public void bytes2Chars() throws Exception {
        TestCase.assertTrue(
                Arrays.equals(
                        mChars1,
                        ConvertKit.bytes2Chars(mBytes1)
                )
        );
    }