Randomly determine whether a shape is filled or unfilled

I have a question that I have been searching for an answer to for a while now, both here and in my books. I have found nothing on this issue so far and was wondering if someone can point me in the right direction on where to go with this particular method. I am trying to create a randomShape() method that instantiates and returns a random Shape object. I have all that figured out for the most part my issue is in my support method called getFilledUnfilled(). This support method needs to randomly determine whether a shape is filled/unfilled. Attached below is my code and I will split the method in question up with the rest of the code. Any help would be greatly appreciated. Thank you for your help.

import java.awt.*;
import java.util.*;
public class Shape {

//enumerated constants
public static enum Shapes {OVAL, CIRCLE, RECTANGLE, SQUARE}

//instance data variables
protected Color color;
protected boolean isFilled;
protected int width;

//class method
public static Shape randomShape(){
    Shape s = new Shape();
    s.getRandomShapeObject();
    return s;
}//end randomShape()

//service method (blank, to be overridden by subclasses)
public void draw(Graphics g, int x, int y){

}//end draw()

//support methods

private void getRandomShapeObject(){
    ArrayList<Shapes>shapeChoice = new ArrayList<Shapes>();
    Random rand = new Random();
    int size = shapeChoice.size();
    shapeChoice.get(rand.nextInt(size));
}//end getRandomShapeObject()

Here is the method in question

private void getFilledUnfilled(){
    ArrayList<Shapes>shapeFillUnfill = new ArrayList<Shapes>();
    Random rand = new Random();


}

Thank you all again for your help