Java Utililty Methods Hour Calculate

List of utility methods to do Hour Calculate

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Description

The list of methods to do Hour Calculate are organized into topic(s).

Method

StringaddHour(String now)
add Hour 
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm");
Date dt;
try {
    dt = format.parse(now);
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(dt);
    calendar.add(Calendar.HOUR, 1);
    return format.format(calendar.getTime());
...
StringaddHours(int date, int hours)
add Hours 
try {
    SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
    Calendar cd = Calendar.getInstance();
    cd.setTime(format.parse(String.valueOf(date)));
    cd.add(Calendar.HOUR_OF_DAY, hours);
    return format.format(cd.getTime());
} catch (ParseException e) {
    throw new RuntimeException(e);
...
DateaddNHours(Date date, int hours)
add N Hours 
Calendar currentDate = Calendar.getInstance();
currentDate.setTime(date);
currentDate.add(Calendar.HOUR_OF_DAY, hours);
return currentDate.getTime();
intdiffHour(String day1, String day2)
diff Hour 
Date parse = seconParse.parse(day1);
Date parse2 = dayParse.parse(day2);
long time = parse.getTime();
long time2 = parse2.getTime();
long diffTimes = time2 - time;
int hours = (int) (diffTimes / 1000 / 60 / 60);
return hours;
StringgetBothTime(String startTime, int hours)
get Both Time 
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
    Date date = sdf.parse(startTime);
    Date retDate = new Date(date.getTime() + hours * 3600000l);
    return sdf.format(retDate);
} catch (ParseException e) {
    e.printStackTrace();
return null;
StringgetCurrHourDate()
get Curr Hour Date 
Calendar now = Calendar.getInstance();
String date = getDate(now.getTime(), "yyyy-MM-dd");
int hour = now.get(Calendar.HOUR_OF_DAY);
return date + "_" + hour;
StringgetDelayEndTime(int hour, String timezone)
get Delay End Time 
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(new Date().getTime());
calendar.add(10, hour);
SimpleDateFormat dateFormatGmt = new SimpleDateFormat("yyyy-MM-dd HH:59:59");
dateFormatGmt.setTimeZone(TimeZone.getTimeZone(timezone));
return dateFormatGmt.format(calendar.getTime());
StringgetDelayTime(int hour, String date)
get Delay Time 
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(string2Date(date).getTime());
calendar.add(10, hour);
SimpleDateFormat dateFormatGmt = new SimpleDateFormat(DATE_FORMAT);
return dateFormatGmt.format(calendar.getTime());
StringgetDiffDateTime(int diff, int hours)
get Diff Date Time 
Calendar c = Calendar.getInstance();
c.setTime(new Date());
c.add(Calendar.DATE, diff);
c.add(Calendar.HOUR, hours);
return dateFormat(c.getTime());
intgetDiffHour(String startTime, String endTime)
get Diff Hour 
long diff = 0;
SimpleDateFormat ft = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
    Date startDate = ft.parse(startTime);
    Date endDate = ft.parse(endTime);
    diff = startDate.getTime() - endDate.getTime();
    diff = diff / (1000 * 60 * 60);
} catch (ParseException e) {
...