Java ZonedDateTime minusWeeks()用法及代碼示例

ZonedDateTime類的minusWeeks()方法用於從此ZonedDateTime中減去周數，並在減去後返回ZonedDateTime的副本。此方法在本地時間軸上運行，將周數減去本地日期時間，並減去周數本地日期-使用區域ID獲取偏移量，將時間轉換回ZonedDateTime。當轉換回ZonedDateTime時，如果本地日期時間重疊，則將盡可能保留偏移量，否則將使用較早的偏移量。此實例是不可變的，不受此方法調用的影響。

用法:

public ZonedDateTime minusWeeks(long weeks)

參數：此方法接受單個參數week，它代表要減去的周，它可以為負。

返回值：此方法基於此日期時間並減去周數，返回ZonedDateTime。

異常：如果結果超出支持的日期範圍，則此方法將引發DateTimeException。

以下示例程序旨在說明minusWeeks()方法：
示例1:

// Java program to demonstrate 
// ZonedDateTime.minusWeeks() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a ZonedDateTime object 
        ZonedDateTime zoneddatetime 
            = ZonedDateTime.parse( 
                "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]"); 
  
        // print instance 
        System.out.println("ZonedDateTime before"
                           + " subtracting weeks: "
                           + zoneddatetime); 
  
        // subtract 10 weeks 
        ZonedDateTime returnvalue 
            = zoneddatetime.minusWeeks(10); 
  
        // print result 
        System.out.println("ZonedDateTime after "
                           + "subtracting 10 weeks: "
                           + returnvalue); 
    } 
}

輸出：

ZonedDateTime before subtracting weeks: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ZonedDateTime after subtracting 10 weeks: 2018-09-27T19:21:12.123+05:30[Asia/Calcutta]

示例2:

// Java program to demonstrate 
// ZonedDateTime.minusWeeks() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a ZonedDateTime object 
        ZonedDateTime zoneddatetime 
            = ZonedDateTime.parse( 
                "2018-10-25T23:12:31.123+02:00[Europe/Paris]"); 
  
        // print instance 
        System.out.println("ZonedDateTime before"
                           + " subtracting weeks: "
                           + zoneddatetime); 
  
        // subtract 2 weeks 
        ZonedDateTime returnvalue 
            = zoneddatetime.minusWeeks(2); 
  
        // print result 
        System.out.println("ZonedDateTime after "
                           + "subtracting 2 weeks: "
                           + returnvalue); 
    } 
}

輸出：

ZonedDateTime before subtracting weeks: 2018-10-25T23:12:31.123+02:00[Europe/Paris]
ZonedDateTime after subtracting 2 weeks: 2018-10-11T23:12:31.123+02:00[Europe/Paris]

參考文獻： https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#minusWeeks(long)

相關用法

注：本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 ZonedDateTime minusWeeks() 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。