java previous_Java TemporalAdjusters previous()用法及代码示例

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，该对象是与任何日期对象作为参数传递的，具有相同的DayOfWeek匹配的先前的日期。将应用此TempotralAdjuster。

用法:

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的DayOfWeek的前一个日期。

返回值：此方法返回星期几的前一天调节器。

以下示例程序旨在说明TemporalAdjusters.previous()方法：

程序1:

// 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

程序2:

// 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