java date 毫秒_如何在几个数字上加上同一个单位

//时间加上秒后的时间 日期
    public static Date timePastTenSecond(Integer second,String otime) {
        try {
            SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            Date dt=sdf.parse(otime);
            Calendar newTime = Calendar.getInstance();
            newTime.setTime(dt);
            newTime.add(Calendar.SECOND,second);//日期加10秒
            Date dt1=newTime.getTime();
//            String retval = sdf.format(dt1);
            return dt1;
        }
        catch(Exception ex) {
            ex.printStackTrace();
            return null;
        }
    }

SimpleDateFormat sdf = new SimpleDateFormat(DateUtil.HOUR_PATTERN);
                Date newDate = new Date();
                String currTime = sdf.format(newDate);
                Date topEndTime = AmsUtil.timePastTenSecond(amsDetailPojo.getToptime().intValue(), currTime);
                amsDetailPojo.setTopStartTime(newDate);
                amsDetailPojo.setTopEndTime(topEndTime);