The withDayOfYear() method of LocalDateTime class in Java is used to get a copy of this LocalDateTime with the dayOfYear changed to the dayOfYear passed as the parameter to this method. The remaining values of this LocalDateTime remains the same.
public LocalDateTime withDayOfYear(int dayOfYear)
Parameter: This method accepts a single mandatory parameter dayOfYear which specifies the dayOfYear to be set in the resultant LocalDateTime instance. The value of this dayOfYear can range from 1 to 366.
Returns: The function returns a LocalDateTime instance with the dayOfYear changed to the dayOfYear passed as the parameter to this method. The remaining values of this LocalDateTime remains the same.
Exceptions: The function throws a DateTimeException if the dayOfYear value is invalid.
Below programs illustrate the LocalDateTime.withDayOfYear() method:
Original LocalDateTime: 2018-11-30T12:54:35.320 New LocalDateTime: 2018-01-01T12:54:35.320
Original LocalDateTime: 2015-04-06T10:15:30 New LocalDateTime: 2015-12-31T10:15:30
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