What exception does CharsetDetector.detect() throw?

[Yi, EungJun]

Hi.

According to the javadoc of CharsetDetector.detect(), it raises an
exception if no charset appears to match the data:

     * Raise an exception if
     *  <ul>
     *    <li>no charsets appear to match the input data.</li>
     *    <li>no input text has been provided</li>
     *  </ul>

But it seems to me that the method returns null but does not raise an
exception. What exception does the method throw?

Thanks in advance.

Best Regards,
EungJun Yi