Undefined Constructor for Polygon

Question

Hello,
I have a undefined constructor error message for polygon in Eclipse and I cannot figure out why.
Initially I have this method and everything worked fine; public void drawing (Graphics g, List <int []> x_Points, List <int []>y_Points) {
          Graphics2D g2d = (Graphics2D) g;
          g2d.setColor(Color.blue);
          g2d.setStroke(new BasicStroke(1F));
          ArrayList<Polygon> list = new ArrayList<Polygon>();
           for( int p = 0; p < x_Points.size(); p++) {
               list.add(new Polygon(x_Points.get(p),y_Points.get(p),x_Points.get(p).length));
                }During the course of writing other methods, I found out that using List<List<Integer>> will be better than List<int []>, so I decided to modify the code above to:public void drawings(Graphics g, List <List<Integer>> x_Points, List <List<Integer>>y_Points) {
          Graphics2D g2d = (Graphics2D) g;
          g2d.setColor(Color.blue);
          g2d.setStroke(new BasicStroke(IF));
          ArrayList<Polygon> list = new ArrayList<Polygon>();
           for( int p = 0; p < x_Points.size(); p++) {
               list.add(new Polygon(x_Points.get(p),y_Points.get(p),x_Points.get(p).size()));
                } But I got this Error; The constructor Polygon(List<Integer>, List<Integer>, int) is undefined
Thanks,
Jona_T

Answer 1

The polygon constructor you are using accepts arrays of ints, not Lists. I think it will work if you change it to:
list.add(new Polygon(x_Points.get(p).toArray(new Integer[0]),y_Points.get(p).toArray(new Integer[0]),x_Points.get(p).size()));toArray converts the list to an array, which is what the Polygon constructor accepts, and the argument of an Integer array tells it to make an array of Integers instead of an array of Objects.