import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.Month;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;

public class TestClass {
    public static void main(String[] args) {
        LocalDate date = LocalDate.of(2020, Month.JANUARY, 20);
        System.out.println("Manually getting data");
        System.out.println(date.getDayOfWeek());
        System.out.println(date.getMonth());
        System.out.println(date.getYear());
        System.out.println(date.getDayOfYear());
        //This is a primitive way to get data out of Date objects
        System.out.println();


        //Better way is this:
        System.out.println("ISO_LOCAL standard");
        date = LocalDate.of(2020, Month.JANUARY, 20);
        LocalTime time = LocalTime.of(11, 12, 34);
        LocalDateTime dateTime = LocalDateTime.of(date, time);
        System.out.println(date.format(DateTimeFormatter.ISO_LOCAL_DATE));
        System.out.println(time.format(DateTimeFormatter.ISO_LOCAL_TIME));
        System.out.println(dateTime.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME));
        System.out.println();
        //It's still not the best, better still are some predetermined formats:

        System.out.println("FormatStyle.SHORT");
        System.out.println();

        DateTimeFormatter dateTimeFormatterOfLocalizedDateTimeShort = DateTimeFormatter.ofLocalizedDateTime(FormatStyle.SHORT);
        System.out.println(dateTimeFormatterOfLocalizedDateTimeShort.format(dateTime)); // 1/20/20, 11:12 AM
//        System.out.println(dateTimeFormatterOfLocalizedDateTime.format(date)); // UnsupportedTemporalTypeException because time missing
//        System.out.println(dateTimeFormatterOfLocalizedDateTime.format(time)); // UnsupportedTemporalTypeException because time missing
        System.out.println();

        DateTimeFormatter dateTimeFormatterOfLocalizedDateShort = DateTimeFormatter.ofLocalizedDate(FormatStyle.SHORT);
        System.out.println(dateTimeFormatterOfLocalizedDateShort.format(dateTime)); // 1/20/20
        System.out.println(dateTimeFormatterOfLocalizedDateShort.format(date)); // 1/20/20
//        System.out.println(dateTimeFormatterOfLocalizedDate.format(time)); // UnsupportedTemporalTypeException because time cannot be formatted as a date
        System.out.println();

        //The format() method exists on both DateTimeFormatter object as well as date/time objects, so the order doesn't matter, output is same:
        System.out.println(dateTime.format(dateTimeFormatterOfLocalizedDateShort)); //1/20/20
        System.out.println(date.format(dateTimeFormatterOfLocalizedDateShort)); //1/20/20
//        System.out.println(time.format(dateTimeFormatterOfLocalizedDate)); // UnsupportedTemporalTypeException because time cannot be formatted as a date
        System.out.println();

        DateTimeFormatter dateTimeFormatterOfLocalizedTimeShort = DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT);
        System.out.println(dateTimeFormatterOfLocalizedTimeShort.format(dateTime)); // 11:12 AM
//        System.out.println(dateTimeFormatterOfLocalizedTime.format(date)); // UnsupportedTemporalTypeException because Time formatter doesn't know how to format date
        System.out.println(dateTimeFormatterOfLocalizedTimeShort.format(time)); //11:12 AM
        System.out.println();
        System.out.println();

        //Now lets use FormatStyle.MEDIUM:

        System.out.println("FormatStyle.MEDIUM");
        System.out.println();

        DateTimeFormatter dateTimeFormatterOfLocalizedDateTimeMedium = DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM);
        System.out.println(dateTimeFormatterOfLocalizedDateTimeMedium.format(dateTime)); // Jan 20, 2020, 11:12:34 AM
//        System.out.println(dateTimeFormatterOfLocalizedDateTime.format(date)); // UnsupportedTemporalTypeException because time missing
//        System.out.println(dateTimeFormatterOfLocalizedDateTime.format(time)); // UnsupportedTemporalTypeException because time missing
        System.out.println();

        DateTimeFormatter dateTimeFormatterOfLocalizedDateMedium = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM);
        System.out.println(dateTimeFormatterOfLocalizedDateMedium.format(dateTime)); // Jan 20, 2020
        System.out.println(dateTimeFormatterOfLocalizedDateMedium.format(date)); // Jan 20, 2020
//        System.out.println(dateTimeFormatterOfLocalizedDate.format(time)); // UnsupportedTemporalTypeException because time cannot be formatted as a date
        System.out.println();

        //The format() method exists on both DateTimeFormatter object as well as date/time objects, so the order doesn't matter, output is same:
        System.out.println(dateTime.format(dateTimeFormatterOfLocalizedDateMedium)); //Jan 20, 2020
        System.out.println(date.format(dateTimeFormatterOfLocalizedDateMedium)); //Jan 20, 2020
//        System.out.println(time.format(dateTimeFormatterOfLocalizedDate)); // UnsupportedTemporalTypeException because time cannot be formatted as a date
        System.out.println();

        DateTimeFormatter dateTimeFormatterOfLocalizedTimeMedium = DateTimeFormatter.ofLocalizedTime(FormatStyle.MEDIUM);
        System.out.println(dateTimeFormatterOfLocalizedTimeMedium.format(dateTime)); // 11:12:34 AM
//        System.out.println(dateTimeFormatterOfLocalizedTime.format(date)); // UnsupportedTemporalTypeException because Time formatter doesn't know how to format date
        System.out.println(dateTimeFormatterOfLocalizedTimeMedium.format(time)); //11:12:34 AM
        System.out.println();

    }
}