Java ZonedDateTime minusWeeks()用法及代码示例

ZonedDateTime类的minusWeeks()方法用于从此ZonedDateTime中减去周数，并在减去后返回ZonedDateTime的副本。此方法在本地时间轴上运行，将周数减去本地日期时间，并减去周数本地日期-使用区域ID获取偏移量，将时间转换回ZonedDateTime。当转换回ZonedDateTime时，如果本地日期时间重叠，则将尽可能保留偏移量，否则将使用较早的偏移量。此实例是不可变的，不受此方法调用的影响。

用法:

public ZonedDateTime minusWeeks(long weeks)

参数：此方法接受单个参数week，它代表要减去的周，它可以为负。

返回值：此方法基于此日期时间并减去周数，返回ZonedDateTime。

异常：如果结果超出支持的日期范围，则此方法将引发DateTimeException。

以下示例程序旨在说明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); 
    } 
}

输出：

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); 
    } 
}

输出：

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]

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

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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 ZonedDateTime minusWeeks() 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。