Passing an enum as a parameter in a method?

Question

Hey, I have an abstract class Medium, where one of the datamembers is an enum.

private Taal talenOndertiteling[];

public enum Taal {
    NEDERLANDS, FRANS, DUITS, ENGELS, SPAANS, ITALIAANS
}
public Taal[] getTalenOndertiteling() {
    return talenOndertiteling;
}

public void setTalenOndertiteling(Taal[] talenOndertiteling) {
    this.talenOndertiteling = talenOndertiteling;
}

Now when I try to call the last method like this:

            BD bd1 = new BD();
            bd1.setTalenOndertiteling(Taal.ENGELS);

I'm getting an error. (The BD class implements the Medium class) Any ideas on how I should be calling the method? And what if I wanted to set several languates, how would I do that?

Thanks!

Answer 1

You have to create an array with one element and pass it to the method:

bd1.setTalenOndertiteling(new Taal[]{Taal.ENGELS});

Answer 2

Your method accepts a Taal[] but your invocation passes a Taal. You have two choices:

Either pass an explicit Taal[]:

bd1.setTalenOndertiteling(new Taal[] {Taal.ENGELS});

or, change the method declaration to take a vararg parameter and have the compiler do it for you:

public void setTalenOndertiteling(Taal... talenOndertiteling) {

Answer 3

The setter expects an array of Taal enums.

So the proper use is:

BD bd1 = new BD();
bd1.setTalenOndertiteling(new Taal[]{Taal.ENGELS});

or more verbose:

BD bd1 = new BD();

Taal[] taals = new Taal[1];
taals[0] = Taal.ENGELS;

bd1.setTalenOndertiteling(taals);

Answer 4

The setTalenOrdertiteling gets an array. So the correct call should be:

bd1.setTalenOndertiteling(new Taal[] {Taal.ENGELS});

Answer 5

two issues: 1) setTalenOndertiteling() is expecting array of Taal, so

bd.setTalenOndertiteling(new Taal[]{Taal.ENGELS};

2) Taal seems to be a nested enum (in BD?), without specific import, you need to do

bd.setTalenOndertiteling(new BD.Taal[]{BD.Taal.ENGELS};