Java中的 TemporalAdjusters previous() 方法和示例

TemporalAdjusters 类的previous(DayOfWeek)方法用于返回先前的 DayOfWeek TemporalAdjuster 对象，该对象可用于获取新的 Date 对象，该对象是具有与从任何 Date 对象传递的参数相同的匹配 DayOfWeek 的先前日期应用了这个 TempotralAdjuster。

句法：

public static TemporalAdjuster previous(DayOfWeek dayOfWeek)

参数：此方法接受dayOfWeek可用于获取新的 Date 对象，该对象是具有相同匹配 DayOfWeek 的前一个日期。

返回值：该方法返回星期调整器的前一天。

下面的程序说明了 TemporalAdjusters.previous() 方法：
方案一：

// Java program to demonstrate
// TemporalAdjusters.previous()
  
import java.time.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // get TemporalAdjuster with the
        // previous in month adjuster
        TemporalAdjuster temporalAdjuster
            = TemporalAdjusters.previous(
                DayOfWeek.WEDNESDAY);
  
        // using adjuster for local date-time
        LocalDate localDate
            = LocalDate.of(1998, 10, 31);
        LocalDate previousDOW
            = localDate.with(temporalAdjuster);
  
        // print
        System.out.println(
            "Previous day of the week "
            + "having WEDNESDAY for localdate "
            + localDate + " is: "
            + previousDOW);
    }
}

输出：

Previous day of the week having WEDNESDAY for localdate 1998-10-31 is: 1998-10-28

方案二：

// Java program to demonstrate
// TemporalAdjusters.previous() method
  
import java.time.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // get TemporalAdjuster with the
        // previous day of week adjuster
        TemporalAdjuster temporalAdjuster
            = TemporalAdjusters.previous(
                DayOfWeek.THURSDAY);
  
        // using adjuster for local date time
        LocalDate localDate
            = LocalDate.of(2029, 12, 11);
        LocalDate previousDOW
            = localDate.with(temporalAdjuster);
  
        // print
        System.out.println(
            "previous day of the week "
            + "having THURSDAY for localdate "
            + localDate + " is: "
            + previousDOW);
    }
}

输出：

previous day of the week having THURSDAY for localdate 2029-12-11 is: 2029-12-06

参考：https: Java Java.time.DayOfWeek)