The firstDayOfYear() method of a TemporalAdjusters class is used to return the “first day of the year” TemporalAdjuster object, which returns a new Date object set to the first day of the year.
Syntax:
public static TemporalAdjuster firstDayOfYear()
Parameters: This method accepts nothing.
Return value: This method returns the first day of the year adjuster, not null.
Below programs illustrate the TemporalAdjusters.firstDayOfYear() method:
Program 1:
// Java program to demonstrate// TemporalAdjusters.firstDayOfYear() import java.time.LocalDate;import java.time.temporal.*; public class GFG { public static void main(String[] args) { // get TemporalAdjuster with first day // of the year adjuster TemporalAdjuster temporalAdjuster = TemporalAdjusters.firstDayOfYear(); // using adjuster for local date-time LocalDate localDate = LocalDate.of(2012, 05, 31); LocalDate firstDayOfYear = localDate.with(temporalAdjuster); // print System.out.println("First day of the " + "year for localdate " + localDate + ": " + firstDayOfYear); }} |
Output:
First day of the year for localdate 2012-05-31: 2012-01-01
Program 2:
// Java program to demonstrate// TemporalAdjusters.firstDayOfYear() method import java.time.LocalDate;import java.time.temporal.*; public class GFG { public static void main(String[] args) { // get TemporalAdjuster with first day // of the year adjuster TemporalAdjuster temporalAdjuster = TemporalAdjusters.firstDayOfYear(); // using adjuster for local date time LocalDate localDate = LocalDate.of(2000, 12, 21); LocalDate firstDayOfYear = localDate.with(temporalAdjuster); // print System.out.println("First day of the " + "year for localdate " + localDate + ": " + firstDayOfYear); }} |
Output:
First day of the year for localdate 2000-12-21: 2000-01-01
References: https://docs.oracle.com/javase/10/docs/api/java/time/format/TemporalAdjusters.html
