java - 日历无法正确设置小时

Question

当我想将时间设置为 00:00:00 时，日历总是设置为 12:00:00

Calendar currentDate = Calendar.getInstance();
// even set AM_PM it was still 12:00:00
// currentDate.set(Calendar.AM_PM, Calendar.AM);
// Calendar.HOUR still not work
currentDate.set(Calendar.HOUR_OF_DAY, 0);
currentDate.set(Calendar.MINUTE, 0);
currentDate.set(Calendar.SECOND, 0);
currentDate.set(Calendar.MILLISECOND, 0); 

我该怎么做？提前致谢。

Answer 1

但是什么时候是 00:00:00，真的，什么时候开始认真对待？是今天吗？还是昨天？

为了消除混淆，尝试类似的东西

Calendar currentDate = Calendar.getInstance();
// even set AM_PM it was still 12:00:00
// currentDate.set(Calendar.AM_PM, Calendar.AM);
// Calendar.HOUR still not work
currentDate.set(Calendar.HOUR_OF_DAY, 0);
currentDate.set(Calendar.MINUTE, 0);
currentDate.set(Calendar.SECOND, 1);
currentDate.set(Calendar.MILLISECOND, 0);