Java 中的 ChronoZonedDateTime 减(long，TemporalUnit)方法，示例

原文:https://www . geeksforgeeks . org/chronozoneddatetime-mins long-tempalalunit-method-in-Java-with-examples/

减()方法的一个时区数据时间界面用来返回这个日期时间的一个副本，减去指定数量的单位。如果由于不支持该单位或其他原因而无法减去该金额，则会引发异常。

语法:

default ChronoZonedDateTime minus(long amountToSubtract,
                           TemporalUnit unit)

参数:此方法接受两个参数:

  • Amount to Subtract: is the amount of unit pair result to be subtracted, which may be a negative number.
  • Unit: is the amount of unit to be subtracted.

返回值:该方法根据该日期时间，减去指定的金额，返回时区时间。

异常:此方法抛出以下异常:

  • Abnormal date and time : If subtraction is not possible,
  • does not support : if the company is not supported.
  • Arithmetic exception : If there is a numerical overflow.

下面的程序说明了减()方法:

程序 1:

// Java program to demonstrate
// ChronoZonedDateTime.minus() method

import java.time.*;
import java.time.chrono.*;
import java.time.temporal.ChronoUnit;

public class GFG {
    public static void main(String[] args)
    {

        // create a ChronoZonedDateTime object
        ChronoZonedDateTime zonedlt
            = ZonedDateTime
                  .parse(
                      "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");

        // subtract 30 Months to ChronoZonedDateTime
        ChronoZonedDateTime value
            = zonedlt.minus(30, ChronoUnit.MONTHS);

        // print result
        System.out.println("ChronoZonedDateTime after"
                           + " subtracting Months:\n "
                           + value);
    }
}

输出:

ChronoZonedDateTime after subtracting Months:
 2016-06-06T19:21:12.123+05:30[Asia/Calcutta]

参考:https://docs . Oracle . com/javase/9/docs/API/Java/time/chrono/chronozoneddatetime . html #减-long-Java . time . temporalunit-

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