java - Convert String date of format yyyy-MM-dd HH:mm:ss.SSS to String MM/dd/yyyy

First convert your String in a date as the follow:

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateInString = "2015-07-16 17:07:21";
try {

    Date date = formatter.parse(dateInString);
    //And then apply the pattern
    formatter.applyPattern("MM/dd/yyyy");
    System.out.println(formatter.format(date));
} catch (ParseException e) {
    e.printStackTrace();
}