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Java ZonedDateTime minusMonths()用法及代码示例

ZonedDateTime类的minusMonths()方法用于减去此ZonedDateTime中的月份数,并在减去后返回ZonedDateTime的副本。此实例是不可变的,不受此方法调用的影响。

用法:

public ZonedDateTime minusMonths(long months)

参数:此方法接受单个参数months,它代表要减去的月份,可以为负数。


返回值:此方法基于此日期时间返回一个ZonedDateTime,并减去月份,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minusMonths()方法:
示例1:

// Java program to demonstrate 
// ZonedDateTime.minusMonths() 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 months: "
                           + zoneddatetime); 
  
        // subtract 10 months 
        ZonedDateTime returnvalue 
            = zoneddatetime.minusMonths(10); 
  
        // print result 
        System.out.println("ZonedDateTime after "
                           + " subtracting 10 months: "
                           + returnvalue); 
    } 
}
输出:

ZonedDateTime before subtracting months: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ZonedDateTime after subtracting 10 months: 2018-02-06T19:21:12.123+05:30[Asia/Calcutta]

示例2:

// Java program to demonstrate 
// ZonedDateTime.minusMonths() 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 months: "
                           + zoneddatetime); 
  
        // subtract 2 months 
        ZonedDateTime returnvalue 
            = zoneddatetime.minusMonths(2); 
  
        // print result 
        System.out.println("ZonedDateTime after "
                           + " subtracting 2 months: "
                           + returnvalue); 
    } 
}
输出:

ZonedDateTime before subtracting months: 2018-10-25T23:12:31.123+02:00[Europe/Paris]
ZonedDateTime after subtracting 2 months: 2018-08-25T23:12:31.123+02:00[Europe/Paris]

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



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