Date

// String to Date

String dtStart = "2010-10-15 09:27:37";
SimpleDateFormat  format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
    Date date = format.parse(dtStart);
    System.out.println(date);
} catch (ParseException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

// Date to String

SimpleDateFormat  dateformat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
  Date date = new Date();
 String datetime = dateFormat.format(date);
 System.out.println("Current Date Time : " + datetime);
} catch (ParseException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}