Purpose of AsyncTask varargs parameters

What are the reasons that Google use varargs for the parameters in the AsyncTask? For example the methods execute(), doInBackground() and publishProgress() all use the [Type]... notation.

I think that makes it "harder" to use so they must have some good reasons which I overlooked?

So, either we have no parameters, one or many parameters. Let's break it down:

1. No parameters (easy): Params parameter is Void and that's it. (The methods cannot use it... so that's pretty safe.)

2. One parameter: Here, I at least, feel the need to make a check at the beginning of the doInBackground() method. For example, here is a task receiving an Integer and producing a result of type Double:

   public Double doInBackground(Integer... myParameters) {
       // we are only expecting one parameter
       if (myParameters.length != 1)
           throw new IllegalArgumentException("!= 1");
   
       return 100d * myParameters[0];
   }
   

3. More than one parameter. Now here must be where Google made the right choice? But as I see it's either you are interested in a list of parameters of the same type, or you want different types of parameters. Google only addressed one of these cases (with different types you need some kind of common interface. In man