當前位置: 首頁>>代碼示例 >>用法及示例精選 >>正文


Java LocalDate minusDays()用法及代碼示例


Java中LocalDate類的minusDays()方法用於從此LocalDate中減去指定天數並返回LocalDate的副本,例如2018-01-01減去1天將得出2018-12-31。此實例是不可變的,不受此方法調用的影響。

用法:

public LocalDate minusDays(long daysToSubtract)

參數:此方法接受單個參數daysToSubtract,該參數表示要減去的天數,可以為負數。


返回值:此方法基於此日期(減去減去的天)返回LocalDate,而不是null。

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minusDays()方法:
示例1:

// Java program to demonstrate 
// LocalDate.minusDays() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a LocalDate object 
        LocalDate date 
            = LocalDate.parse("2018-11-13"); 
  
        // print instance 
        System.out.println("LocalDate before"
                           + " subtracting days: " + date); 
  
        // subtract 17 days 
        LocalDate returnvalue 
            = date.minusDays(17); 
  
        // print result 
        System.out.println("LocalDate after "
                           + " subtracting days: " + returnvalue); 
    } 
}
輸出:
LocalDate before subtracting days: 2018-11-13
LocalDate after  subtracting days: 2018-10-27

示例2:

// Java program to demonstrate 
// LocalDate.minusDays() 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 days: " + date); 
  
        // subtract -15 days 
        LocalDate returnvalue 
            = date.minusDays(-15); 
  
        // print result 
        System.out.println("LocalDate after "
                           + " subtracting days: " + returnvalue); 
    } 
}
輸出:
LocalDate before subtracting days: 2018-12-24
LocalDate after  subtracting days: 2019-01-08

參考:
https://docs.oracle.com/javase/10/docs/api/java/time/LocalDate.html#minusDays(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 LocalDate minusDays() 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。