Java 中的 YearMonth withYear()方法，带示例
原文:https://www . geesforgeks . org/year-month-with year-method-in-Java-with-examples/
with Year(int year)YearMonth类的方法，用于使用作为参数传递的 year 来更改 YearMonth 对象的年份，然后该方法返回更改后的 year month 的副本。此实例是不可变的，不受此方法调用的影响。
语法:
public YearMonth withYear(int year)
参数:该方法接受月作为参数，该参数是返回的年-月中要设置的年份，从 MIN_YEAR 到 MAX_YEAR。
返回值:该方法返回一个基于该年-月的年-月和请求的年。
异常:如果年份值无效，此方法抛出日期时间异常。
下面的程序说明了 withYear()方法: 程序 1:
// Java program to demonstrate
// YearMonth.withYear() method
import java.time.*;
import java.time.temporal.*;
public class GFG {
public static void main(String[] args)
{
// create a YearMonth object
YearMonth yr
= YearMonth.of(2019, 12);
// print instance
System.out.println("YearMonth before"
+ " applying method: "
+ yr);
// apply withYear method of YearMonth class
YearMonth updatedlocal = yr.withYear(2023);
// print instance
System.out.println("YearMonth after"
+ " applying method: "
+ updatedlocal);
}
}
Output:
YearMonth before applying method: 2019-12
YearMonth after applying method: 2023-12
程序 2:
// Java program to demonstrate
// YearMonth.withYear() method
import java.time.*;
import java.time.temporal.*;
public class GFG {
public static void main(String[] args)
{
// create a YearMonth object
YearMonth yr
= YearMonth.of(2022, 7);
// print instance
System.out.println("YearMonth before"
+ " applying method: "
+ yr);
// apply withYear method of YearMonth class
YearMonth updatedlocal = yr.withYear(1992);
// print instance
System.out.println("YearMonth after"
+ " applying method: "
+ updatedlocal);
}
}
Output:
YearMonth before applying method: 2022-07
YearMonth after applying method: 1992-07
参考文献:https://docs . Oracle . com/javase/10/docs/API/Java/time/year month . html # with year(int)
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