Polyline question

[Ravi Kotha]

Hi,

Is there a class in Java that supports Polyline. Lets say I have points (10,20) (20,30) (40,50) (60,70). Can I construct a line with all these points. I saw in java.awt.geom package, there is a class Line2D, but it can take only two points. What if I wanna construct a line with 'n' points?

[Garrett Rowe]

I don't think there is, but you shouldn't have too much of a problem rolling your own.

public class Polyline
{
   private Line2D[] segments;
 
   public void draw(Graphics2D g2d)
   {
      for (Line2D seg : segments)
      { 
         g2d.draw(seg);
      }
   }
}

[ January 03, 2007: Message edited by: Garrett Rowe ]

[Craig Wood]

The Graphics class lists a method with this signature

drawPolyline(int[] xPoints, int[] yPoints, int nPoints)

Another useful class is GeneralPath. moveTo the first set of coordinates and lineTo each of the next in sequence. For a closed path (optional) either closePath or lineTo the initial set of coordinates.

[Ravi Kotha]

Thanks Rowe

My problem is not drawing lines. Lets say I have set of points coming from the front end (10,20) (30,50), (45,67), (87,34). Using these points I want to form a polyline which includes all the points. How can I do that?

[Ravi Kotha]

Thanks Craig,

Hope it will be helpful.