[Java] 시간차이 구하기

public void compareCurrentTime() throws java.text.ParseException {
        
    SimpleDateFormat f = new SimpleDateFormat("HH:mm:ss", Locale.KOREA);
    Date firstCurrentTime = f.parse("11:02:58");
    Date secondCurrentTIme = f.parse("10:45:34");
    long diff = firstCurrentTime.getTime() - secondCurrentTIme.getTime();
    long timeDiff = diff / 1000;
 
}