如何添加分钟到我的日期 [英] How to add minutes to my Date
问题描述
我有此日期对象:
SimpleDateFormat df = new SimpleDateFormat(yyyy-mm-dd HH:mm) ;
日期d1 = df.parse(interviewList.get(37).getTime());
d1的值为 Fri Jan 07 17:40:00 PKT 2011
现在我要添加10分钟到上述日期。
日历cal = Calendar.getInstance();
cal.setTime(d1);
cal.add(Calendar.MINUTE,10);
String newTime = df.format(cal.getTime());
值 newTime
更改为 2011-50-07 17:50
但它应该是 07-01-2011 17:50
。
它会正确添加分钟,但也会改变月份,不知道为什么!
您的问题是您使用 mm
。您应该使用 MM
。 MM
为月份, mm
为分钟。尝试使用 yyyy-MM-dd HH:mm
其他方法:
它可以这么简单(其他选项是使用 joda-time )
static final long ONE_MINUTE_IN_MILLIS = 60000; //毫秒
日历日期= Calendar.getInstance );
long t = date.getTimeInMillis();
Date afterAddingTenMins = new Date(t +(10 * ONE_MINUTE_IN_MILLIS));
I have this date object:
SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd HH:mm");
Date d1 = df.parse(interviewList.get(37).getTime());
value of d1 is Fri Jan 07 17:40:00 PKT 2011
Now I am trying to add 10 minutes to the date above.
Calendar cal = Calendar.getInstance();
cal.setTime(d1);
cal.add(Calendar.MINUTE, 10);
String newTime = df.format(cal.getTime());
Value of newTime
changes to 2011-50-07 17:50
but it should be 07-01-2011 17:50
.
It adds minutes correctly but it also changes month, don't know why!
The issue for you is that you are using mm
. You should use MM
. MM
is for month and mm
is for minutes. Try with yyyy-MM-dd HH:mm
Other approach:
It can be as simple as this (other option is to use joda-time)
static final long ONE_MINUTE_IN_MILLIS=60000;//millisecs
Calendar date = Calendar.getInstance();
long t= date.getTimeInMillis();
Date afterAddingTenMins=new Date(t + (10 * ONE_MINUTE_IN_MILLIS));
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