Java 中带有 DayOfYear()方法的 LocalDate 示例
原文:https://www . geesforgeks . org/local date-with dayof year-in-Java-method-with-examples/
Java 中 LocalDate 类的 withDayOfYear() 方法返回一个该 LocalDate 的副本，其中更改了日期。
语法:
public LocalDate withDayOfYear(int dayOfYear)
参数:该方法接受一个强制参数dayfyear，指定在结果中设置的日期，从 1 到 365-366。
返回:该函数根据请求日期返回一个本地日期，不为空。
异常:当日数值无效时，函数抛出日期时间异常。
以下程序说明了local date . witdayofyear()方法:
程序 1:
// Program to illustrate the withDayOfYear() method
import java.util.*;
import java.time.*;
public class GfG {
public static void main(String[] args)
{
// Parses the date
LocalDate dt1 = LocalDate.parse("2018-12-07");
LocalDate result = dt1.withDayOfYear(01);
// Prints the date with year
System.out.println("The date with day of year is: " + result);
}
}
输出:
The date with day of year is: 2018-01-01
程序二:
// Program to illustrate the withDayOfYear() method
// Exceptions
import java.util.*;
import java.time.*;
import java.time.temporal.ChronoField;
public class GfG {
public static void main(String[] args)
{
try {
// Parses the date
LocalDate dt1 = LocalDate.parse("2018-12-07");
LocalDate result = dt1.withDayOfYear(370);
// Prints the date with year
System.out.println("The date with month is: " + result);
}
catch (Exception e) {
System.out.println(e);
}
}
}
输出:
java.time.DateTimeException: Invalid value for DayOfYear (valid values 1 - 365/366): 370
参考:T2【https://docs . Oracle . com/javase/10/docs/API/Java/time/local date . html # with dayofyear(int)
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