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Android Build an Interactive Story App (Retired) The Model-View-Controller Pattern Adding a Custom Constructor

Posted by Nicolas Haney
Nicolas Haney
3,445 Points

Default constructor not working.

public void setType() { mType = "SHUTTLE"; }

This code should work but is not acceptable. I cant figure out why.

Spaceship.java 
public class Spaceship {
    public String mType;

    public String getType() {
      return mType;
    }

    public void setType(String type) {
      mType = type;
    }

  public void setType()
  {
   mType = "SHUTTLE";
  }
}
Grigorij Schleifer
Grigorij Schleifer
10,365 Points
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Hey Nicolas,

could we help you?

Grigorij

3 Answers

orbyt
orbyt
10,358 Points
orbyt
orbyt
10,358 Points

Ok so the challenge is asking you to create a constructor for the Spaceship class without any parameters, and then setting mType inside it.

Try something like:

public Spaceship() {
   mType = "SHUTTLE";
}
Grigorij Schleifer
Grigorij Schleifer
10,365 Points
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Hi Nicolas,

in the first part of the challenge you should create a constructor:

public Spaceship() {
// constructors Name should be same as the class Name without a return type
// then two {}

   mType = "SHUTTLE";

// here you initiate your  mType variable with a String called "SHUTTLE"
}

The next Task is to create a second constructot that takes a String parameter which describes the Type or Name of the Spaceship:

 public Spaceship(String shipType) {
// the constructor takes a String 
   mType = shipType;
// here you initialise mType to shipType
}

So if you wan´t fight against Aliens you will need many different ships/objects of the Spaceship class. So if you are creating a Spaceship obect somewhere else in your code. You can call your type of the ship this way.

Spaceship shipOne = new Spaceship("Destroyer");
Spaceship shipTwo = new Spaceship("Killer")

And so on ....

May the force be with you !

Grigorij

Prasoon Shukla
Prasoon Shukla
3,426 Points
Prasoon Shukla
Prasoon Shukla
3,426 Points

If you are writing a constructor, there is no need to have return type (here void). Also, keep the name of constructor same as Class. Then set the value of member variable equal to static value you want to pass. In case you are writing a constructor with a parameter, set the value of member variable equal to parameter you have passed in the constructor.