Creating a triangle using polygon class problem, URGENT??

Question

Hi i am creating a triangle using polygon class which will eventually be used in a game where by a user clicks on the screen and triangles appear.
class MainWindow extends Frame
     private Polygon[] m_polyTriangleArr;
                   MainWindow()
                          m_nTrianglesToDraw = 0;
         m_nTrianglesDrawn = 0;
                         m_polyTriangleArr = new Polygon[15];
                         addMouseListener(new MouseCatcher() );
        setVisible(true);
                     class MouseCatcher extends MouseAdapter
                         public void mousePressed(MouseEvent evt)
              Point ptMouse = new Point();
              ptMouse = evt.getPoint();
            if(m_nTrianglesDrawn < m_nTrianglesToDraw)
                            int npoints = 3;
                    m_polyTriangleArr[m_nTrianglesDrawn]
                  = new Polygon( ptMouse[].x, ptMouse[].y, npoints);
}When i compile my code i get the following error message:
Class Expected
')' expectedThe two error messages are refering to the section new Polygon(....)
line. Please help

Answer 1

Cannot find symbol constructor Polygon(int, int, int)
Can some one tell me where this needs to go and what i should generally
look like pleaseI don't think it is a good idea to try and add the constructor that the compiler
can't find. Instead you should use the constructor that already exists
in the Polygon class: ie the one that looks like Polygon(int[], int[], int).
But this requires you to pass two int arrays and not two ints as you
are doing at the moment. As you have seen, evt.getPoint() only supplies
you with a single pair of ints: the x- and y-coordinates of where the mouse
button was pressed.
And this is the root of the problem. To draw a triangle you need three
points. From these three points you can build up two arrays: one containing
the x-coordinates and one containing the y-coordinates. It is these two
arrays that will be used as the first two arguments to the Polygon constructor.
So your task is to figure out how you can respond to mouse presses
correctly, and only try and add a new triangle when you have all three of its
vertices.
[Edit] This assumes that you expect the user to specify all three vertices of the
triangle. If this isn't the case, say what you do expect.