Hi,

Could somebody help me with my small program and tell me how to return key and value from my map. Namely I have so far the following classes that will print for me car number, but how can I print car number and car type from my map of cars?

import java.util.*;


public class Car {

  private static Map<Integer, Car> cars = new TreeMap<Integer, Car>();
  private int carNumber;
  private String carType;

  private Car(int carNumber, String carType) {
       this.carNumber = carNumber;
       this.carType = carType;
  }

  public static Car add(int carNumber, String carType) {
  Car retValue = cars.get(carNumber);
  if(retValue == null) {
       cars.put(carNumber, new Car(carNumber, carType));
  }
  return retValue;
  }

  public static Collection<Car> getCollection(){
       return cars.values();
  }

  public static Car get(int carNumber) {
       return cars.get(carNumber);
  }

  public static Car get(String carType) {
       return cars.get(carType);
  }

  public int getCarNumber() {
       return carNumber;

  }

  public String getCarType() {
       return carType;
  }


}

public class Main {

  public static void main (String[] args) {

  for(int i=0; i<5; i++) {
     Car.add(i, "Sport");
  }
  System.out.println(car.getCollection());

}
//output: [1,2,3,4]


}