Question

import java.util.GregorianCalendar;
public class CalendarMain {
    public static void main(String[] args) {
        GregorianCalendar calendar = new GregorianCalendar();
        int month = calendar.get(GregorianCalendar.MONTH)+1;
        int year = calendar.get(GregorianCalendar.YEAR);
        int weekday = calendar.get(GregorianCalendar.DAY_OF_WEEK);
        int dayOfMonth = calendar.get(GregorianCalendar.DAY_OF_MONTH);
        System.out.println(month+"/"+dayOfMonth+"/"+year);
        calendar.add(GregorianCalendar.DAY_OF_MONTH, 10);
        System.out.println(GregorianCalendar.DAY_OF_MONTH);
    }
}

我正在尝试将10天添加到当前日期，但我遇到了一个奇怪的问题。它似乎没有正确添加。

输出

2014年9月18日

5

Answer 1

// Get a calendar which is set to a specified date.
Calendar calendar = new GregorianCalendar(2014, Calendar.JANUARY, 1);

// Get the current date representation of the calendar.
Date startDate = calendar.getTime();

// Increment the calendar's date by 1 day.
calendar.add(Calendar.DAY_OF_MONTH, 1);

// Get the current date representation of the calendar.
Date endDate = calendar.getTime();

System.out.println(startDate);
System.out.println(endDate);

Answer 2

我认为最后一行是错误的，试试这个：

System.out.println(calendar.get(GregorianCalendar.DAY_OF_MONTH));

Answer 3

使用

System.out.println(calendar.get(GregorianCalendar.DAY_OF_MONTH));

而不是

System.out.println(GregorianCalendar.DAY_OF_MONTH);

输出

9/18/2014
28

您在代码中所做的是打印GregorianCalendar.DAY_OF_MONTH最终变量的整数代码，无论您在calendar中添加了什么，它都将保持 5 。您需要使用calendar.get(...)函数来获取此日历的月份日期。

在公历中添加日期

3 个答案: