为什么我加了 10 分钟后月份变成了 50?
我有这个日期对象:
SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd HH:mm");
Date d1 = df.parse(interviewList.get(37).getTime());
d1 的值为 Fri Jan 07 17:40:00 PKT 2011
现在我正在尝试在上面的日期上增加 10 分钟.
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());
newTime 的值更改为 2011-50-07 17:50但应该是 07-01-2011 17:50.
Value of newTime changes to 2011-50-07 17:50
but it should be 07-01-2011 17:50.
它正确地添加了分钟，但它也改变了月份，不知道为什么！
It adds minutes correctly but it also changes month, don't know why!
推荐答案
你的问题是你正在使用 mm.您应该使用 MM.MM 是月份，mm 是分钟.试试 yyyy-MM-dd HH:mm
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
其他方法:
可以这么简单(其他选择是使用 joda-time)
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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