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Matthew Williams
3,103 PointsNeed help with this question
I just want to know what I'm doing wrong. I'm trying to pass in the String constructor but it's not letting me do that. I spend two days trying to figure this out and I don't get any of it.
Please help me.
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) {
// the constructor takes a String
Type = shipType;
// here I initialise Type to shipType
}
}
2 Answers
Tarek M.Tolba
Courses Plus Student 3,613 PointsWhat is wrong is: what is Type? you didn't define Type as a variable anywhere.
Ok lets figure how to fix this, he wants you to set shipType member variable to the constructor parameter there are 2 ways to do that :
1st- if you are using a constructor parameter name different than the member variable name can do like that
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 Type) {
// the constructor takes a String
shipType = Type;
// here I initialise shipType member varibale to Type parameter;
}
}
2nd- if you are setting the constructor parameter name same as the member variable name you can do that:
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) {
// Look out, both parameter and member variable are named shipType and they aren't the same thing.
this.shipType = shipType;
//"this" word refers to the class name which is SpaceShip, so (this.shipType = SpaceShip.shipType=the member variable)
//but just shipType here refers to the parameter since it's the closest.
// here I initialise shipType member varibale to Type parameter;
}
}