Java System.currentTimeMillis（）以人类可读格式UTC

Question

Similar question might be asked many times but I couldn't find question which ask for Human Readable Format in UTC time.

I want to convert currentTimeMillis() to Human Readable Format for example "YYMMDDHHMMSS". I am trying to use SimpleDateFormat but it returns LocalTime not UTC.

long currentTimeMillis = System.currentTimeMillis();
DateFormat dateFormat = new SimpleDateFormat("yyMMddHHmm");
Date date = new Date(currentTimeMillis);
String currentTime = dateFormat.format(date);

this code gives me LocalTime but I want time in UTC only.

Answer 1

It may help you. If not get back with problem.

long currentTimeMillis = System.currentTimeMillis();
DateFormat dateFormat = new SimpleDateFormat("yy/MM/dd HH:mm");
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
Date date = new Date(currentTimeMillis);
String currentTime = dateFormat.format(date);