Java TemporalAdjusters previous()用法及代碼示例

TemporalAdjusters類的previous(DayOfWeek)方法用於返回先前的DayOfWeek TemporalAdjuster對象，該對象可用於獲取新的Date對象，該對象是與任何日期對象作為參數傳遞的，具有相同的DayOfWeek匹配的先前的日期。將應用此TempotralAdjuster。

用法:

public static TemporalAdjuster previous(DayOfWeek dayOfWeek)

參數：此方法接受dayOfWeek，可用於獲取新的Date對象，該對象是具有相同匹配的DayOfWeek的前一個日期。

返回值：此方法返回星期幾的前一天調節器。

以下示例程序旨在說明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); 
    } 
}

輸出：

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); 
    } 
}

輸出：

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

參考文獻：https://docs.oracle.com/javase/10/docs/api/java/time/temporal/TemporalAdjusters.html#previous(java.time.DayOfWeek)

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注：本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 TemporalAdjusters previous() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。