WeekFields类的dayOfWeek()方法用于返回一个字段,以基于此WeekFields访问星期几。例如,如果第一个day-of-week是星期一,那么它将具有值1,其他日期从星期二为2到星期日为7。
用法:
public TemporalField dayOfWeek()
参数:此方法不接受任何内容。
返回值:此方法返回一个字段,该字段提供对day-of-week的访问,该字段具有本地化编号,不为null。
以下示例程序旨在说明WeekFields.dayOfWeek()方法:
程序1:
// Java program to demonstrate
// WeekFields.dayOfWeek() method
import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.temporal.TemporalField;
import java.time.temporal.WeekFields;
public class GFG {
public static void main(String[] args)
{
// create WeekFields
WeekFields weekFields
= WeekFields.of(DayOfWeek.MONDAY, 1);
// apply dayOfWeek()
TemporalField dayOfWeek
= weekFields.dayOfWeek();
// create a LocalDate
LocalDate day = LocalDate.of(2021, 12, 21);
// get day of week for localdate
int dow = day.get(dayOfWeek);
// print results
System.out.println("day of week for "
+ day + ":" + dow);
}
}
输出:
day of week for 2021-12-21:2
程序2:
// Java program to demonstrate
// WeekFields.dayOfWeek() method
import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.temporal.TemporalField;
import java.time.temporal.WeekFields;
public class GFG {
public static void main(String[] args)
{
// create WeekFields
WeekFields weekFields
= WeekFields.of(DayOfWeek.SUNDAY, 1);
// apply dayOfWeek()
TemporalField dayOfWeek
= weekFields.dayOfWeek();
// create a LocalDate
LocalDate day
= LocalDate.of(2018, 05, 31);
// get day of week for localdate
int dow = day.get(dayOfWeek);
// print results
System.out.println("day of week for "
+ day + ":" + dow);
}
}
输出:
day of week for 2018-05-31:5
参考:https://docs.oracle.com/javase/10/docs/api/java/time/temporal/WeekFields.html#dayOfWeek()
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注:本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 WeekFields dayOfWeek() 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。