當前位置: 首頁>>代碼示例 >>用法及示例精選 >>正文


Java ChronoPeriod subtractFrom()用法及代碼示例


使用java.time.chrono包中ChronoPeriod接口的excludeFrom(Temporal)方法將此ChronoPeriod減去指定的時間對象,作為參數傳遞。

用法:

Temporal subtractFrom(Temporal temporalObject)

參數:此方法接受參數TemporalObject,該參數是在此ChronoPeriod中要調整的數量。它不能為空。


返回值:此方法返回一個相同類型的對象,將其TemporalObject調整為該對象。

異常:該方法拋出:

  • DateTimeException:如果無法減去。
  • ArithmeticException:如果發生數字溢出。

以下示例說明了ChronoPeriod.subtractFrom()方法:

程序1

// Java code to show the function subtractFrom() 
// to subtract the two given periods 
  
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.ChronoUnit; 
  
public class ChronoPeriodDemo { 
  
    // Driver Code 
    public static void main(String[] args) 
    { 
        // Defining period 
        int year = 4; 
        int months = 11; 
        int days = 10; 
        ChronoPeriod p1 = Period.of(year, months, days); 
  
        // Get the time to be adjusted 
        LocalDateTime currentTime 
            = LocalDateTime.now(); 
  
        // Adjust the time 
        // using subtractFrom() method 
        System.out.println( 
            p1.subtractFrom(currentTime)); 
    } 
}
輸出:
2014-07-07T14:22:21.929

程序2

// Java code to show the function subtractFrom() 
// to subtract the two given periods 
  
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.ChronoUnit; 
  
public class ChronoPeriodDemo { 
  
    // Driver Code 
    public static void main(String[] args) 
    { 
        // Defining period 
        int year1 = 2; 
        int months1 = 7; 
        int days1 = 8; 
        ChronoPeriod p1 = Period.of(year1, months1, days1); 
  
        // Get the time to be adjusted 
        LocalDateTime currentTime 
            = LocalDateTime.now(); 
  
        // Adjust the time 
        // using subtractFrom() method 
        System.out.println( 
            p1.subtractFrom(currentTime)); 
    } 
}
輸出:
2016-11-09T14:22:26.600

參考: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoPeriod.html#subtractFrom-java.time.temporal.Temporal-



相關用法


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