How to use

setHours

method

in

java.util.Date

 Date today = new Date();
today.setHours(0); //same for minutes and seconds

Date date = new Date();
 date.setHours(date.getHours() + 8);
 System.out.println(date);
 SimpleDateFormat simpDate;
 simpDate = new SimpleDateFormat("kk:mm:ss");
 System.out.println(simpDate.format(date));

@Override
public void setHours(int hours) {
 checkFrozen();
 super.setHours(hours);
}

public static String getSimpleTimeString(long time) {
  String strTemp = "";
  Date dateCreate = new Date(time);
  Date dateNow = new Date();
  dateNow.setHours(0);
  dateNow.setMinutes(0);
  dateNow.setSeconds(0);
  if (dateCreate.before(dateNow)) {
    SimpleDateFormat myFmt2 = new SimpleDateFormat("MM-dd");
    myFmt2.setTimeZone(TimeZone.getDefault());
    strTemp = myFmt2.format(dateCreate);
  } else {
    SimpleDateFormat myFmt2 = new SimpleDateFormat("HH:mm");
    myFmt2.setTimeZone(TimeZone.getDefault());
    strTemp = myFmt2.format(dateCreate);
  }
  return strTemp;
}

/**
 * Resets the date to have no time modifiers. Note that the hour might not be zero if the time
 * hits a DST transition date.
 *
 * @param date the date
 */
@SuppressWarnings("deprecation") // GWT requires Date
public static void resetTime(Date date) {
 long msec = resetMilliseconds(date.getTime());
 date.setTime(msec);
 date.setHours(0);
 date.setMinutes(0);
 date.setSeconds(0);
}

date2am.setHours(TWO_AM); 
date2am.setMinutes(ZERO_MINUTES); 

date.setHours(this.hours == 24 && this.midnightIs24 ? 0 : this.hours);

 public static void main(String[] args) {
  final Date now = new Date();
  System.out.println(now);
  now.setHours(5);
  System.out.println(now);
}

@Override
public void setHours(int hours) {
 checkFrozen();
 super.setHours(hours);
}

private Date createDate(Date date, String time) {
  if (time.length() == 5) {
    date.setHours(new Integer(time.substring(0, 2)));
    date.setMinutes(new Integer(time.substring(3, 5)));
  } else if (time.length() == 4) {
    date.setHours(new Integer(time.substring(0, 1)));
    date.setMinutes(new Integer(time.substring(2, 4)));
  }
  return date;
}

 AlarmManager am = (AlarmManager) con.getSystemService(Context.ALARM_SERVICE);

Date futureDate = new Date(new Date().getTime() + 86400000);


futureDate.setHours(8);
futureDate.setMinutes(0);
futureDate.setSeconds(0);


Intent intent = new Intent(con, MyAppReciever.class);

PendingIntent sender = PendingIntent.getBroadcast(con, 0, intent,
    PendingIntent.FLAG_UPDATE_CURRENT);

@SuppressWarnings("deprecation")
protected static Date getRoundDate(Date date) {
  Date roundDate = new Date(date.getTime());
  roundDate.setHours(0);
  roundDate.setMinutes(0);
  roundDate.setSeconds(0);
  return roundDate;
}

@SuppressWarnings("deprecation")
public void setHours(int hours) {
  Capturer.capture(Instrumenter.CAPTURE_ID_JAVA_UTIL_DATE, this, "setHours", "(I)V", new Object[] {hours});
  super.setHours(hours);
  Capturer.enable(Instrumenter.CAPTURE_ID_JAVA_UTIL_DATE, this, CaptureLog.RETURN_TYPE_VOID);
}

private static void addDays(Date date, int days) {
 CalendarUtil.addDaysToDate(date, days);
 if (date.getHours() != 0) {
  // We hit DST transition, try reseting back so follow up days continue showing midnight:
  date.setHours(0);
 }
}

/**
 * Taken from {@link com.google.gwt.user.datepicker.client.CalendarUtil}
 */
private static void resetTime(Date date) {
  long msec = resetMilliseconds(date.getTime());
  date.setTime(msec);
  date.setHours(0);
  date.setMinutes(0);
  date.setSeconds(0);
}

AlarmManager am = (AlarmManager) con
     .getSystemService(Context.ALARM_SERVICE);
 Date futureDate = new Date(new Date().getTime() + 86400000);
 futureDate.setHours(8);
 futureDate.setMinutes(0);
 futureDate.setSeconds(0);
 Intent intent = new Intent(con, MyAppReciever.class);
 PendingIntent sender = PendingIntent.getBroadcast(con, 0, intent,
     PendingIntent.FLAG_UPDATE_CURRENT);
 am.set(AlarmManager.RTC_WAKEUP, futureDate.getTimeInMillis(), sender);

  private Date getExecutionTimeValue(GlusterVolumeSnapshotSchedule schedule) {
    Date dt = new Date();
    dt.setHours(schedule.getExecutionTime().getHours());
    dt.setMinutes(schedule.getExecutionTime().getMinutes());
    return dt;
  }
}),

@SuppressWarnings("deprecation")
protected Date trySetTimeFromTimeBoxText(Date value) {
  try {
    Date time = timeOnlyFormat.parse(timeBox.getText());
    value.setHours(time.getHours());
    value.setMinutes(time.getMinutes());
  } catch (IllegalArgumentException e) {
    // Couldn't parse hours, just ignore them and use the old,
    // unmodified value.
  }
  return value;
}

  @SuppressWarnings("deprecation")
  @Override
  protected void writeImpl() {
    Date newDate = dateChooser.getDate();
    Date timeValues = (Date) timeSpinner.getValue();
    newDate.setHours(timeValues.getHours());
    newDate.setMinutes(timeValues.getMinutes());
    newDate.setSeconds(timeValues.getSeconds());
    data.setDate(newDate);
  }
}

@Before
public void setUp() throws Exception {
  Date startTime = new Date();
  startTime.setYear(115);
  startTime.setMonth(10);
  startTime.setDate(10);
  startTime.setHours(12);
  startTime.setMinutes(50);
  startTime.setSeconds(30);
  TimeInstant.START_TIME = startTime;
}