我有一个任务来创造一个种族。我为工厂方法创建了一个类，并为每个字段生成随机值，除了我的奖牌信息之外，一切似乎都正常。在生成比赛时，除了“奖牌”之外，我得到了所有的字符串值，我似乎找不到它的原因。
我的代码

public class RaceUtils {
// Create new Medals Method
public static Medal generateMedals() {
    int position = (int) ((Math.random() * 3) + 1);
    Medal medal = new Medal(position, "1500");
    return medal;
}
// Create new Driver Method
public static Driver generateDriver() {
    Medal[] medals = new Medal[4];
    int age = (int) (Math.random() * 30) + 10;
    for (int i = 0; i < medals.length; i++) {
        medals[i] = generateMedals();
    }
    return new Driver("Dan", age, medals);
}
// Create new Car Method
public static Car generateCar() {
    Driver[] drivers = new Driver[2];
    for (int i = 0; i < drivers.length; i++) {
        drivers[i] = generateDriver();
    }
    CarModels carModels = CarModels.values()[(int) (Math.random() * CarModels.values().length)];
    int year = (int) (Math.random() * 1990 - 2000) + 1990;
    return new Car(carModels, year, drivers);
}
// Create new Circuit Method
public static Circuit generateCircuit() {
    Car[] cars = new Car[10];
    for (int i = 0; i < cars.length; i++) {
        cars[i] = generateCar();
    }
    CircuitName names = CircuitName.values()[(int) (Math.random() * CircuitName.values().length)];
    Country country = Country.values()[(int) (Math.random() * Country.values().length)];
    int length = (int) (Math.random() * 30) + 10;
    return new Circuit(names, country, length, cars);
}
// Print Method
public static void print(Circuit[] circuit) {
    for (int i = 0; i < circuit.length; i++) {
        System.out.println(circuit[i].toString());
    }
}
public class Medal {
private int position;
private String string;
public Medal(int position, String string) {
    setPosition(position);
    this.string = string;
}
public int getPosition() {
    return position;
}
public void setPosition(int position) {
    if (this.position > 0 || this.position <= 3) {
        this.position = position;
    } else {
        System.out.println("Position is out of range");
    }
}
public String getString() {
    return string;
}
public void setString(String string) {
    this.string = string;
}
@Override
public String toString() {
    return "Medal [position=" + position + ", string=" + string + "]";
}
  public class Driver {
private String name;
private int age;
private Medal[] medals;
public Driver(String name, int age, Medal[] medals) {
    this.name = name;
    this.age = age;
    this.medals = medals;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public int getAge() {
    return age;
}
public void setAge(int age) {
    this.age = age;
}
public Medal[] getMedals() {
    return medals;
}
public void setMedals(Medal[] medals) {
    this.medals = medals;
}
@Override
public String toString() {
    return "Driver: Name = " + name + ", Age = " + age + ", Medals = " + medals;
}
public class Car {
private CarModels models;
private int year;
private Driver[] drivers;
public Car(CarModels models, int year, Driver[] drivers) {
    this.models = models;
    this.year = year;
    this.drivers = drivers;
}
public CarModels getModels() {
    return models;
}
public void setModels(CarModels models) {
    this.models = models;
}
public int getYear() {
    return year;
}
public void setYear(int year) {
    this.year = year;
}
public Driver[] getDrivers() {
    return drivers;
}
public void setDrivers(Driver[] drivers) {
    this.drivers = drivers;
}
@Override
public String toString() {
    return "Car: Model = " + models + ", Car Year = " + year + ", Drivers: " + Arrays.toString(drivers);
}
public class Circuit {
private CircuitName names;
private Country country;
private int length;
private Car[] cars;
public Circuit(CircuitName names, Country country, int length, Car[] cars) {
    this.names = names;
    this.country = country;
    this.length = length;
    this.cars = cars;
}
public CircuitName getNames() {
    return names;
}
public void setNames(CircuitName names) {
    this.names = names;
}
public Country getCountry() {
    return country;
}
public void setCountry(Country country) {
    this.country = country;
}
public int getLength() {
    return length;
}
public void setLength(int length) {
    this.length = length;
}
public Car[] getCars() {
    return cars;
}
public void setCars(Car[] cars) {
    this.cars = cars;
}
@Override
public String toString() {
    return "Circuit: Circuit Name: " + names + ", Country: " + country + ", Circuit Length: " + length
            + " Kilometers" + Arrays.toString(cars);
}
public class RaceProgram {
private static final int LEN = 4;
public static void main(String[] args) {
    Circuit[] circuit = new Circuit[LEN];
    for (int i = 0; i < circuit.length; i++) {
        circuit[i] = RaceUtils.generateCircuit();
    }
    RaceUtils.print(circuit);
}

我得到了什么
赛道：赛道名称：usaraceopen，国家：美国，赛道长度：13公里[车：车型=三菱，车年=1457，车手：[车手：姓名=丹，年龄=12，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@782830e，车手：姓名=丹，年龄=20，奖牌=[loop.classes.nir\u ex.ex14\u race.dedal@470e2030]，汽车：车型=法拉利，汽车年份=1831，驾驶员：[驾驶员：姓名=丹，年龄=37，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@3fb4f649，车手：姓名=丹，年龄=21，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@33833882]，汽车：型号=马自达，汽车年份=628，驾驶员：[驾驶员：姓名=丹，年龄=27，奖牌=[loop.classes.nir\u ex.ex14\u race.madal@200a570f，车手：姓名=丹，年龄=19，奖牌=[loop.classes.nir\u ex.ex14\u race.dedal@16b3fc9e]，汽车：车型=菲亚特，车年=1002，驾驶员：[驾驶员：姓名=丹，年龄=19，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@e2d56bf，车手：姓名=丹，年龄=10，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@244038d0]，汽车：车型=法拉利，汽车年份=441，驾驶员：[驾驶员：姓名=丹，年龄=22，奖牌=[loop.classes.nir\u ex.ex14\u race.madal@5680a178，车手：姓名=丹，年龄=24，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@5fdef03a]，汽车：车型=菲亚特，车年=1651，驾驶员：[驾驶员：姓名=丹，年龄=30，奖牌=[loop.classes.nir\u ex.ex14\u race.madal@3b22cdd0，车手：姓名=丹，年龄=16，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@1e81f4dc]，汽车：型号=铃木，汽车年份=602，驾驶员：[驾驶员：姓名=丹，年龄=38，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@4d591d15，车手：name=dan，age=32，奖牌=[loop.classes.nir\u ex.ex14\u race.dedal@65ae6ba4]，汽车：车型=菲亚特，汽车年份=982，驾驶员：[驾驶员：姓名=丹，年龄=31，奖牌=[loop.classes.nir\u ex.ex14\u race.madal@48cf768c，车手：姓名=丹，年龄=18，奖牌=[loop.classes.nir\u ex.ex14\u race.medal@59f95c5d]，汽车：车型=铃木，汽车年份=693，驾驶员：[驾驶员：姓名=丹，年龄=24，奖牌=[loop.classes.nir\u ex.ex14\u race.madal@5CD43C2，车手：姓名=丹，年龄=21，奖牌=[loop.classes.nir\u ex.ex14\u race.dedal@4aa8f0b4]，汽车：型号=三菱，汽车年份=1595，驾驶员：[驾驶员：姓名=丹，年龄=37，奖牌=[loop.classes.nir\u ex.ex14\u race.madal@7960847b，车手：姓名=丹，年龄=17，奖牌=[loop.classes.nir\u ex.ex14\u race.dedal@6a6824be]]
我需要什么
如你所见，我把奖牌的所有信息都分开了。