Java中的 OffsetDateTime withDayOfYear() 方法及示例
Java中 OffsetDateTime 类的withDayOfYear()方法返回此 OffsetDateTime 的副本,其中年份按参数中指定的方式更改。
句法:
public OffsetDateTime withDayOfYear(int dayOfYear)
参数:此方法接受单个参数dayOfYear ,该参数指定要在结果中设置的年份,范围为 1 到 365-366。
返回值:它返回一个基于此日期的 OffsetDateTime 和请求的一年中的哪一天,而不是 null。
异常:当年份值无效或该特定年份的月份的年份无效时,程序将引发DateTimeException 。
下面的程序说明了withDayOfYear()方法:
方案一:
// Java program to demonstrate the withDayOfYear() method
import java.time.OffsetDateTime;
import java.time.ZonedDateTime;
public class GFG {
public static void main(String[] args)
{
// Parses the date1
OffsetDateTime date1
= OffsetDateTime
.parse(
"2018-12-12T13:30:30+05:00");
// Prints dates
System.out.println("Date1: " + date1);
// Changes the day of year
System.out.println("Date1 after altering day-of-year: "
+ date1.withDayOfYear(32));
}
}
输出:
Date1: 2018-12-12T13:30:30+05:00
Date1 after altering day-of-year: 2018-02-01T13:30:30+05:00
方案二:
// Java program to demonstrate the withDayOfYear() method
import java.time.OffsetDateTime;
public class GFG {
public static void main(String[] args)
{
try {
// Parses the date1
OffsetDateTime date1
= OffsetDateTime
.parse(
"2018-12-12T13:30:30+05:00");
// Prints dates
System.out.println("Date1: " + date1);
// Changes the day of year
System.out.println("Date1 after altering day-of-year: "
+ date1.withDayOfYear(367));
}
catch (Exception e) {
System.out.println("Exception: " + e);
}
}
}
输出:
Date1: 2018-12-12T13:30:30+05:00
Exception: java.time.DateTimeException:
Invalid value for DayOfYear
(valid values 1 - 365/366): 367
参考:https: Java/time/OffsetDateTime.html#withDayOfYear(int)