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Android Build an Interactive Story App The Model-View-Presenter Pattern Adding a Custom Constructor

Posted by Mohamed Belhadj
Mohamed Belhadj
923 Points

Now add a second constructor that takes a String parameter. Use this parameter to update shipType to a specific type of

Hey, i dont know what i am doing wrong can someone help me?

Spaceship.java 
public class Spaceship {
    public String shipType;

    public String getShipType() {
      return shipType;
    }

    public void setShipType(String shipType) {
      this.shipType = shipType;
    }

  public Spaceship() {
      shipType = "SHUTTLE";
    }

  public Spaceship (String shipType) {
      shipType = shipType;
    }
}

2 Answers

andren
andren
28,558 Points
andren
andren
28,558 Points

The problem is that the member variable (shipType) and the parameter passed in to the constructor (shipType) share the exact same name. When you have a naming conflict like that you have to use the this keyword when referring to the member variable in order to help Java distinguish it from the name of the parameter. Like this:

 public Spaceship (String shipType) {
    this.shipType = shipType;
}
Mohamed Belhadj
Mohamed Belhadj
923 Points

Thanks alot man!

Gift Nyamapfene
Gift Nyamapfene
5,409 Points
Gift Nyamapfene
Gift Nyamapfene
5,409 Points

public class Spaceship { public String shipType;

public String getShipType() {
  return shipType;
}

public Spaceship (String shipType) { this.shipType = shipType; }

public Spaceship() {

shipType = "SHUTTLE"; } }