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Java ZonedDateTime plusMonths()用法及代碼示例


ZonedDateTime類的plusMonths()方法用於在此ZonedDateTime中添加月份數,並在添加後返回ZonedDateTime的副本。此方法在本地時間軸上操作,將月份添加到本地日期時間,並在添加月份後添加本地日期使用區域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 plusMonths(long months)

參數:此方法接受單個參數months,它代表要添加的月份,可以為負數。


返回值:此方法基於添加了月份的日期時間返回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plusMonths()方法:
示例1:

// Java program to demonstrate 
// ZonedDateTime.plusMonths() 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"
                           + " adding months: "
                           + zoneddatetime); 
  
        // add 3 months 
        ZonedDateTime returnvalue 
            = zoneddatetime.plusMonths(3); 
  
        // print result 
        System.out.println("ZonedDateTime after "
                           + " adding months: "
                           + returnvalue); 
    } 
}
輸出:
ZonedDateTime before adding months: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ZonedDateTime after  adding months: 2019-03-06T19:21:12.123+05:30[Asia/Calcutta]

示例2:

// Java program to demonstrate 
// ZonedDateTime.plusMonths() 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"
                           + " adding months: "
                           + zoneddatetime); 
  
        // add 20 months 
        ZonedDateTime returnvalue 
            = zoneddatetime.plusMonths(20); 
  
        // print result 
        System.out.println("ZonedDateTime after "
                           + " adding months: "
                           + returnvalue); 
    } 
}
輸出:

ZonedDateTime before adding months: 2018-10-25T23:12:31.123+02:00[Europe/Paris]
ZonedDateTime after adding months: 2020-06-25T23:12:31.123+02:00[Europe/Paris]

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



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