Was ist ein Datum/Uhrzeit-Feld in Java?

import java.time.LocalDate;
import java.time.temporal.ChronoField;
public class Demo {
   public static void main(String args[]) {  
      //Instantiating the LocalDate class
      LocalDate lDate = LocalDate.now();
      int field = lDate.get(ChronoField.DAY_OF_MONTH);
      System.out.println("Day of the month: "+field);
      field = lDate.get(ChronoField.DAY_OF_WEEK);
      System.out.println("Day of the month: "+field);
      field = lDate.get(ChronoField.DAY_OF_YEAR);
      System.out.println("Day of the month: "+field);
      long epoch = lDate.getLong(ChronoField.EPOCH_DAY);
      System.out.println("Day of the month: "+epoch);
      field = lDate.get(ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH);
      System.out.println("Week in the month: "+field);
      field = lDate.get(ChronoField.ALIGNED_DAY_OF_WEEK_IN_YEAR);
      System.out.println("Day of the week in an year: "+field);
      field = lDate.get(ChronoField.ERA);
      System.out.println("Era: "+field);
   }
}

Day of the month: 11
Day of the month: 3
Day of the month: 316
Day of the month: 18577
Week in the month: 4
Day of the week in an year: 1
Era: 1

import java.time.DayOfWeek;
import java.time.LocalTime;
import java.time.Month;
import java.time.Year;
import java.time.temporal.ChronoField;
public class Demo {
   public static void main(String args[]) {  
      //Instantiating the LocalDateTime class
      LocalTime lTime = LocalTime.now();
      System.out.println(lTime);  
      int field = Year.of(2019).get(ChronoField.YEAR);
      System.out.println("Year: "+field);  
      field = Month.of(8).get(ChronoField.MONTH_OF_YEAR);
      System.out.println("Year: "+field);  
      field = DayOfWeek.of(3).get(ChronoField.DAY_OF_WEEK);
      System.out.println("Year: "+field);  
   }
}

20:01:43.171
Year: 2019
Year: 8
Year: 3