Java中的 YearMonth minus(TemporalAmount) 方法及示例
YearMonth类的minus(TemporalAmount)方法用于在从该 YearMonth 对象中减去指定数量的 TemporalAmount 后返回该 YearMonth 的副本。如果不能从 YearMonth 中减去指定的单位,则会引发异常。传递的 TemporalAmount 是从 Period 对象创建的。此实例是不可变的,不受此方法调用的影响。
句法:
public YearMonth minus(TemporalAmount amountToSubtract)
参数:此方法仅接受一个参数TemporalAmount ,该参数表示要从 YearMonth 对象中减去的金额。
返回值:此方法基于此 YearMonth 返回一个 YearMonth,并减去指定的金额。
异常:此方法抛出以下异常:
- DateTimeException –如果无法进行减法,则会引发此异常。
- ArithmeticException –如果发生数字溢出,则会引发此异常。
下面的程序说明了减法(TemporalAmount amountToSubtract)方法:
方案一:
// Java program to demonstrate
// YearMonth.minus(TemporalAmount amountToSubtract) method
import java.time.*;
import java.time.temporal.*;
public class GFG {
public static void main(String[] args)
{
// create a YearMonth object
YearMonth thisYearMonth = YearMonth.of(2019, 11);
// print instance
System.out.println("YearMonth :"
+ thisYearMonth);
// create temporalAmount object from period class
// passing temporalAmount to
// minus() method
YearMonth value
= thisYearMonth.minus(
Period.ofYears(22));
// print result
System.out.println("Value after Subtraction: "
+ value);
}
}
输出:
YearMonth :2019-11
Value after Subtraction: 1997-11
方案二:
// Java program to demonstrate
// YearMonth.minus(TemporalAmount amountToSubtract) method
import java.time.*;
import java.time.temporal.*;
public class GFG {
public static void main(String[] args)
{
// create a YearMonth object
YearMonth thisYearMonth = YearMonth.of(2022, 11);
// print instance
System.out.println("YearMonth :"
+ thisYearMonth);
// create temporalAmount object from period class
// passing temporalAmount to
// minus() method
YearMonth value
= thisYearMonth.minus(
Period.ofMonths(20));
// print result
System.out.println("Value after Subtraction: "
+ value);
}
}
输出:
YearMonth :2022-11
Value after Subtraction: 2021-03
参考:
https://docs.oracle.com/javase/10/docs/api/java Java Java)