Java LocalDate minusWeeks()用法及代码示例

Java中LocalDate类的minusWeeks()方法用于从此LocalDate中减去指定周数并返回LocalDate的副本，例如2018-12-24减去一周将得出2018-12-17。此实例是不可变的，不受此方法调用的影响。

用法:

public LocalDate minusWeeks(long weeksToSubtract)

参数：此方法接受单个参数weeksToSubtract，该参数表示要减去的周数，可以为负数。

返回值：此方法基于该日期返回LocalDate，并减去周数，而不是null。

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 
// LocalDate.minusWeeks() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a LocalDate object 
        LocalDate date 
            = LocalDate.parse("2018-12-26"); 
  
        // print instance 
        System.out.println("LocalDate before"
                           + " subtracting weeks: " + date); 
  
        // subtract 2 weeks 
        LocalDate returnvalue 
            = date.minusWeeks(2); 
  
        // print result 
        System.out.println("LocalDate after "
                           + " subtracting weeks: " + returnvalue); 
    } 
}

输出：

LocalDate before subtracting weeks: 2018-12-26
LocalDate after  subtracting weeks: 2018-12-12

示例2:

// Java program to demonstrate 
// LocalDate.minusWeeks() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a LocalDate object 
        LocalDate date 
            = LocalDate.parse("2018-12-24"); 
  
        // print instance 
        System.out.println("LocalDate before"
                           + " subtracting weeks: " + date); 
  
        // subtract -13 weeks 
        LocalDate returnvalue 
            = date.minusWeeks(-13); 
  
        // print result 
        System.out.println("LocalDate after "
                           + " subtracting weeks: " + returnvalue); 
    } 
}

输出：

LocalDate before subtracting weeks: 2018-12-24
LocalDate after  subtracting weeks: 2019-03-25

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

相关用法

注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 LocalDate 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。