title: Hashmap overwriting values
body: <p>Hey im trying to make a hashMap store for planes.  But when i add, it will only print out one flight.  Can anyone help me with this.
  Here is my code:</p>
  
  <pre><code>import java.util.Scanner;
  
  
  public class MainApp 
  {
      private Scanner keyboard = new Scanner(System.in);
      public static void main(String[] args)
      {
          new MainApp().start();  
      }
  
      public void start()
      {
          Airline aerLingus = new Airline("AerLingus");
          PlaneStore planeStore = new PlaneStore("Aer Lingus");
  
          Flight p1 = new Flight("Aer Lingus","A01", 150.5, 10.5, 500, Flight.AIRPLANETYPE.AIRBUS);
          Flight p2 = new Flight("Aer Lingus","B01", 50.3, 1.5, 91, Flight.AIRPLANETYPE.CORPORATE);
          Flight p3 = new Flight("Aer Lingus","C01", 12.2, -3.1, 56, Flight.AIRPLANETYPE.AIRBUS);
  
  
          Flight p4 = new Flight("Ryan Air","D01", 10.5, 1.5, 430, Flight.AIRPLANETYPE.PRIVATE);
          Flight p5 = new Flight("Ryan Air","E01", 0.3, 2.1, 101, Flight.AIRPLANETYPE.CORPORATE);
          Flight p6 = new Flight("Ryan Air","F01", 2.2, -3, 291, Flight.AIRPLANETYPE.AIRBUS);
          planeStore.addFlight("",p1);
          planeStore.addFlight("",p2);
          planeStore.addFlight("",p3);
          planeStore.print();
  
          aerLingus.add(planeStore);
          aerLingus.add(planeStore);
          aerLingus.add(planeStore);
  
          aerLingus.printPlane();
      }
  
  }
  
  import java.util.TreeMap;
  
  
  public class PlaneStore 
  {
      private String airlineName;
      private TreeMap&lt;String,Flight&gt; planeMap;
  
  
      public PlaneStore(String airlineName) 
      {
          this.airlineName = "";
          planeMap = new TreeMap&lt;String,Flight&gt;();
      }
  
  
      public String getAirlineName() {
          return airlineName;
      }
  
  
      public TreeMap&lt;String, Flight&gt; getFlightList() {
          return planeMap;
      }
      public void addFlight(String airline,Flight flight)
      {
          planeMap.put(airline, flight);
      }
  
      // ---------------------------------------------------------------------------------------
      // Name: Print.
      // ---------------------------------------------------------------------------------------
      public void print()
      {
          System.out.println("\n********Student's in the Company.********");
          for (Flight flight : planeMap.values()) {
              // System.out.println(employee); to print the toString of Employee
              // class
              // or:
              System.out.println("Airline:\t" + flight.getAirline());
              System.out.println("Flight Number:\t" + flight.getFlightNumber());
              System.out.println("Fuel Remaining:\t" + flight.getFuelRemaining());
          }
  
      }
  
  
  }
  public class Flight 
  {
      private String airline;
      private String flightNumber;
      private double fuelRemaining;
      private double overdue;
      private int passengerNumber;
      private AIRPLANETYPE planeType;
  
      public enum AIRPLANETYPE
      {
          AIRBUS("1"), CORPORATE("2"), PRIVATE("3");
  
          private String planeName;
  
          private AIRPLANETYPE(String planeName)
          {
              this.planeName = planeName;
          }
      }
  
  
      public Flight(String airline, String flightNumber, double fuelRemaining,
              double overdue, int passengerNumber, AIRPLANETYPE planeType) 
      {
          super();
          this.airline = airline;
          this.flightNumber = flightNumber;
          this.fuelRemaining = fuelRemaining;
          this.overdue = overdue;
          this.passengerNumber = passengerNumber;
          this.planeType = planeType;
      }
  
      public String getAirline() {
          return airline;
      }
  
      public void setAirline(String airline) {
          this.airline = airline;
      }
  
      public String getFlightNumber() {
          return flightNumber;
      }
  
      public void setFlightNumber(String flightNumber) {
          this.flightNumber = flightNumber;
      }
  
      public double getFuelRemaining() {
          return fuelRemaining;
      }
  
      public void setFuelRemaining(double fuelRemaining) {
          this.fuelRemaining = fuelRemaining;
      }
  
      public double getOverdue() {
          return overdue;
      }
  
      public void setOverdue(double overdue) {
          this.overdue = overdue;
      }
  
      public int getPassengerNumber() {
          return passengerNumber;
      }
  
      public void setPassengerNumber(int passengerNumber) {
          this.passengerNumber = passengerNumber;
      }
  
      public AIRPLANETYPE getPlaneType() {
          return planeType;
      }
  
      public void setPlaneType(AIRPLANETYPE planeType) {
          this.planeType = planeType;
      }
  
  
      public String toString() 
      {
          return "Flight [airline=" + airline + ", flightNumber=" + flightNumber
                  + ", fuelRemaining=" + fuelRemaining + ", overdue=" + overdue
                  + ", passengerNumber=" + passengerNumber + ", planeType="
                  + planeType + "]";
      }
  
  
  
  
  }
  </code></pre>