java.time.DayOfWeek的plus()方法是Java中的内置函数,该函数使用一个长整数作为参数,并在向前或向后按传递的参数指定的几天前进后返回DayOfWeek的实例。计算从星期日到星期一在周末结束时进行。指定的时间段可以是正数或负数。
方法声明:
public DayOfWeek plus(long days)
用法:
DayOfWeek dayOfWeekObject = dayOfWeekObject.plus(long days)
参数:此方法以天为参数,其中:
- days–是前进或后退的天数。
- dayOfWeekObject–是DayOfWeek对象的实例。
返回值:在向前或向后前进几天后,该函数将返回DayOfWeek的实例。
以下示例程序旨在说明上述方法:
示例1:
// Java Program Demonstrate plus()
// method of DayOfWeek
import java.time.DayOfWeek;
class DayOfWeekExample {
public static void main(String[] args)
{
// Getting an instance of DayOfWeek from int value
DayOfWeek dayOfWeek = DayOfWeek.of(2);
// Printing the day of the week
// and its Int value
System.out.println("Day of the Week : "
+ dayOfWeek.name()
+ " - "
+ dayOfWeek.getValue());
// Number of days to advance
long adv = 10;
// Advancing the day
dayOfWeek = dayOfWeek.plus(adv);
// Printing the day of the week and its
// Int value after adv days
System.out.println("Day of the Week after "
+ adv + " days: "
+ dayOfWeek.name() + " - "
+ dayOfWeek.getValue());
}
}
输出:
Day of the Week : TUESDAY - 2 Day of the Week after 10 days: FRIDAY - 5
示例2:
// Java Program Demonstrate plus()
// method of DayOfWeek
import java.time.DayOfWeek;
class DayOfWeekExample {
public static void main(String[] args)
{
// Getting an instance of DayOfWeek
// from int value
DayOfWeek dayOfWeek = DayOfWeek.of(7);
// Printing the day of the week
// and its Int value
System.out.println("Day of the Week : "
+ dayOfWeek.name()
+ " - "
+ dayOfWeek.getValue());
// Number of days to advance
long adv = -3;
// Advancing the day
dayOfWeek = dayOfWeek.plus(adv);
// Printing the day of the week and its
// Int value after adv days
System.out.println("Day of the Week after "
+ adv + " days: "
+ dayOfWeek.name()
+ " - "
+ dayOfWeek.getValue());
}
}
输出:
Day of the Week : SUNDAY - 7 Day of the Week after -3 days: THURSDAY - 4
参考: https://docs.oracle.com/javase/8/docs/api/java/time/DayOfWeek.html#plus-long-
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注:本文由纯净天空筛选整理自rupesh_rao大神的英文原创作品 DayOfWeek plus() method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。