import java.util.*;
 
class Ideone {
static class Car {
  String name;
  String sold;
  Car(String name, String sold) {
    this.name = name;
    this.sold = sold;
  }
}
 
public static void main (String[] args) {
    ArrayList <Car> carsList = new ArrayList <Car> ();
 
    carsList.add(new Car("BMW", "2023-01-01T02:00:00.800Z"));
    carsList.add(new Car("Jeep", "2023-01-02T02:00:00.800Z"));
    carsList.add(new Car("Benz", "2023-01-03T02:00:00.800Z"));
String maxDate = carsList.stream()
        .map(car -> car.sold)
        .max(String::compareTo)
        .orElse(null);
    System.out.println( maxDate );
}
} 

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