java 如何计算两个日期之间的差异
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How can I calculate the difference between two dates
提问by code511788465541441
Possible Duplicate:
How do I calculate someone's age in Java?
可能的重复：
如何在 Java 中计算某人的年龄？
I have two dates eg 19/03/1950 and 18/04/2011. how can i calculate the difference between them to get the person's age? do I have to keep multiplying to get the hours or seconds etc?
我有两个日期，例如 19/03/1950 和 18/04/2011。我怎样才能计算他们之间的差异来得到这个人的年龄？我必须继续乘以得到小时或秒等吗？
回答by Bala R
String date1 = "26/02/2011";
String date2 = "27/02/2011";
String format = "dd/MM/yyyy";
SimpleDateFormat sdf = new SimpleDateFormat(format);
Date dateObj1 = sdf.parse(date1);
Date dateObj2 = sdf.parse(date2);
long diff = dateObj2.getTime() - dateObj1.getTime();
int diffDays = (int) (diff / (24* 1000 * 60 * 60));
回答by Bernd Elkemann
You use the classes Date and Duration:
您使用类 Date 和 Duration：
http://download.oracle.com/javase/1.5.0/docs/api/java/util/Date.html
http://download.oracle.com/javase/1.5.0/docs/api/javax/xml/datatype/Duration.html
http://download.oracle.com/javase/1.5.0/docs/api/java/util/Date.html
http://download.oracle.com/javase/1.5.0/docs/api/javax/xml/datatype/Duration.html
You create Date-objects, then use Duration's methods addTo() and subtract()
您创建日期对象，然后使用 Duration 的方法 addTo() 和 minus()
回答by Umesh K
The following code will give you difference between two dates:
以下代码将为您提供两个日期之间的差异：
import java.util.Date;
import java.util.GregorianCalendar;
public class DateDiff {
public static void main(String[] av) {
/** The date at the end of the last century */
Date d1 = new GregorianCalendar(2000, 11, 31, 23, 59).getTime();
/** Today's date */
Date today = new Date();
// Get msec from each, and subtract.
long diff = today.getTime() - d1.getTime();
System.out.println("The 21st century (up to " + today + ") is "
+ (diff / (1000 * 60 * 60 * 24)) + " days old.");
}
}
