LocalDateExample.java

package JEP150DateTimeAPI;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.Month;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;

import static java.lang.String.format;

public class LocalDateExample {
    public static void main(String[] args) {
        LocalDate today = LocalDate.now();
        System.out.println(format("Today's date is %s", today));
        // Today's date is 2022-05-22

        LocalDate firstDay2022 = LocalDate.of(2022, Month.APRIL, 1);
        System.out.println(format("My specific first date is %s", firstDay2022));
        // My specific first date is 2022-04-01

        // https://docs.oracle.com/javase/8/docs/api/java/time/ZoneId.html
        LocalDate timeZoneCurrentDate = LocalDate.now(ZoneId.of("Europe/Istanbul"));
        System.out.println(format("The current date is %s for Europe/Istanbul time zone", timeZoneCurrentDate));
        //The current date is 2022-05-22 for Europe/Istanbul time zone

        LocalDate dateFromBase = LocalDate.ofEpochDay(365);
        System.out.println(format("365th day from base date is %s", dateFromBase));
        // 365th day from base date is 1971-01-01

        LocalDate hundredDay2022 = LocalDate.ofYearDay(2022, 100);
        System.out.println(format("The 100th day of 2022 date is %s", hundredDay2022));
        // The 100th day of 2022 date is 2022-04-10

        // https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html
        String dateString = "2022-05-23 22:29";
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
        LocalDateTime parsedDateTime = LocalDateTime.parse(dateString, formatter);
        System.out.println(format("%s parsed value is %s", dateString, parsedDateTime));
        // 2022-05-23 22:29 parsed value is 2022-05-23T22:29

        LocalDate pastDate = LocalDate.parse("2022-02-02");
        boolean isBefore = today.isBefore(pastDate); // false
        System.out.println(isBefore);
        boolean isAfter = today.isAfter(pastDate); // true
        System.out.println(isAfter);
        boolean isEqual = today.isEqual(pastDate); // false
        System.out.println(isEqual);
    }
}