String myDateString = "6/21/2012 3:12:00 AM";
               
DateFormat myDateFormat = new SimpleDateFormat("M/d/yyyy h:mm:ss a");
               


               


               


               
/* Conversion */
               
Date myOldTime = null;
               


               
try {
               
   myOldTime = myDateFormat.parse( myDateString );
               
} catch (Exception e) {
               
  println("Could not parse date.");
               
}
               


               


               
/* Calculation */
               
if( myOldTime != null ) { // Did we succeed parsing the date string?
               


               
  Calendar myCalendar = GregorianCalendar.getInstance();  // We need a calendar to calculate stuff
               
  myCalendar.setTime( myOldTime ); // Put the time in the calendar
               
  myCalendar.add( Calendar.DATE, 14 ); // Add 14 days
               
  myCalendar.add( Calendar.HOUR, 8 ); // Add 8 hours
               


               
  Date myNewTime = myCalendar.getTime(); // Get the new time back
               


               


               
  /* Format and output */
               
  println( "Time at the beginning was:" );
               
  println( myDateFormat.format( myOldTime ) );
               
  
               
  println( "Time is now:" );
               
  println( myDateFormat.format( myNewTime ) );
               


               
}