title: How to convert string to hours in dart?
body: <p>I have string like "080000000000" mean 08.00 AM. So, i'm using format DateFormat('jm');  </p>
  
  <p>I tried to substring 4 first string convert using DateTime.parse but throws an exception.</p>
  
  <p>How to achieve the given string to  08.00 AM? </p>