Java中的 YearMonth plus(long,unit) 方法及示例
YearMonth类的plus(long, unit)方法用于在将指定数量的 TemporalUnit 添加到此 Year-month 对象后返回此 Year-month 的副本。如果指定的单位不能添加到年月,则抛出异常。此实例是不可变的,不受此方法调用的影响。
句法:
public YearMonth plus(long amountToadd, TemporalUnit unit)
参数:此方法接受两个参数:
- amountToadd :此参数表示要添加到结果中的单位数量。
- unit该参数表示添加量的单位。
返回值:此方法基于此年月返回一个年月,并添加指定的金额。
异常:此方法抛出以下异常:
- DateTimeException –如果无法添加,则会引发此异常。
- UnsupportedTemporalTypeException –如果不支持该单元,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 plus(long, unit) 方法:
方案一:
Java
// Java program to demonstrate
// YearMonth.plus(long, unit) 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(2017, 8);
// print instance
System.out.println("YearMonth :"
+ thisYearMonth);
// apply plus(long, unit) method
// adding 15 Years
YearMonth value
= thisYearMonth.plus(15, ChronoUnit.YEARS);
// print result
System.out.println("After addition YearMonth: "
+ value);
}
}
Java
// Java program to demonstrate
// YearMonth.plus(long, unit) 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, 12);
// print instance
System.out.println("YearMonth :"
+ thisYearMonth);
// apply plus(long, unit) method
// adding 30 Months
YearMonth value
= thisYearMonth.plus(30, ChronoUnit.MONTHS);
// print result
System.out.println("After addition YearMonth: "
+ value);
}
}
输出:
YearMonth :2017-08
After addition YearMonth: 2032-08
方案二:
Java
// Java program to demonstrate
// YearMonth.plus(long, unit) 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, 12);
// print instance
System.out.println("YearMonth :"
+ thisYearMonth);
// apply plus(long, unit) method
// adding 30 Months
YearMonth value
= thisYearMonth.plus(30, ChronoUnit.MONTHS);
// print result
System.out.println("After addition YearMonth: "
+ value);
}
}
输出:
YearMonth :2019-12
After addition YearMonth: 2022-06
参考:
https://docs.oracle.com/javase/10/docs/api/java /time/Year.html#plus(long, Java Java)