Fast polyline drawing like for polygon...

Question

I need to draw as fast as possible a lot of
polylines from arrays of points.
I tried several ways :
Way 1 ------------
GeneralPath polylineShape = new GeneralPath(GeneralPath.WIND_EVEN_ODD,1024);
polylineShape.moveTo(xpts[0],ypts[0]);
for (int i=1;i<num_pts;i++) {
polylineShape.lineTo(xpts,ypts[i]);
((Graphics2D)g).draw(polylineShape);
->>> TOO SLOW
Way 2 ------------
g.drawPolyline(xpts, ypts, num_pts);
->>> FASTER but not enough
Way 3 -----------
Polygon polygonShape = new Polygon();
polygonShape.xpoints = xpts;
polygonShape.ypoints = ypts;
polygonShape.npoints = num_pts;
((Graphics2D)g).draw(polygonShape);
->>> 30% faster than Way 2 : but it draws a closed
polygon, not a polyline
-> How to draw a polyline as fast as way 3 ?
(I definitely don't want a polygon, but a polyline)

Answer 1

You could do the method (3), then just draw the last segment as a line in background color...