We create a polygon in order to fill it. The Polygon class is part of the standard awt package. We create a polygon then add points to it as required.
To complete the flag of the Bahamas you must add the black triangle which represents the unity and vigour of the people.
We need to four triangle to draw the flag of Jamaica. If we get it right we will leave a yellow cross.
Each triangle must be given a different name - you can choose your own names or call them ttri, btri, ltri and rtri (for top, bottom, left and right).
The Seychelles has a cheerful flag; four triangles and a quadrilateral.
We tire of coming up with names for our polygons. In this example we reuse the same old polygon - we reset it after it has done its job.