if you just only need to get check status.
plz try Annotation.GetCheckStatus();
/**
* get status of check-box and radio-box.<br/>
* this method require premium license
* @return <br/>-1 if annotation is not valid control.<br/>0 if check-box is not checked.<br/>1 if check-box checked.<br/>2 if radio-box is not checked.<br/>3 if radio-box checked.
*/
final public int GetCheckStatus()
{
return Page.getAnnotCheckStatus(page.hand, hand);
}
if you mean label text of radio, there no methods.
because the label text display on page is part of content stream on page object.
and not in annotation object.