title: How to get SAK to Identify smart card type using JAVA?
body: <p>I am using Java Smart Card API to access.
  I have NXP Mifare desfire 4K , 1K , Ultra light smart cards with me &amp; trying to find out its type programically in JAVA.</p>
  
  <p>I referred to document AN10833 from NXP site (<a href="http://www.nxp.com/documents/application_note/AN10833.pdf" rel="nofollow">http://www.nxp.com/documents/application_note/AN10833.pdf</a>). 
  I have following queries related:   </p>
  
  <ol>
  <li>How to get SAK using JAVA?</li>
  <li>what is APDU to execute REQA command?</li>
  </ol>