How to set date format of a date into Date but not String?

问题

Here's what I need to do :

I want to change the date2 into a Date but not String.

 Date date = new Date();
 DateFormat format = new SimpleDateFormat ("yyyy/MM/dd",Locale.ENGLISH);
 String date2 = format.format(date);

It does not allow me to save date2 as a Date. Someone please help me. Thanks

回答1:

import java.text.SimpleDateFormat;
import java.util.Date;

String your_date = "2014-12-15 00:00:00.0";
DateFormat format = new SimpleDateFormat ("yyyy/MM/dd",Locale.ENGLISH);
Date new_date = format.parse(your_date);
System.out.println(new_date);

回答2:

java.util.Date objects do not have a format. They just represent a date value. You cannot "set the format of a Date object" because a Date object can't store this information.

What you are asking ("how do I set the format of a Date object") is not possible, because that's not how Date objects work.

What you should do instead is just work with the Date object and at the point where it needs to be displayed, you convert it to a String in the desired format using a SimpleDateFormat object.

来源：https://stackoverflow.com/questions/27482606/how-to-set-date-format-of-a-date-into-date-but-not-string