Java Reference
In-Depth Information
Put this example in a new directory,
TryPolyLine
. You can use the
TryPolyLine
class that contains
main()
and the
Point
class exactly as they are, so if you still have them, copy the source files to the new
directory. You just need to change the
PolyLine
class definition:
import java.util.LinkedList;
public class PolyLine {
// Construct a polyline from an array of points
public PolyLine(Point[] points) {
// Add the points
for(Point point : points) {
polyline.add(point);
}
}
// Construct a polyline from an array of coordinates
public PolyLine(double[][] coords) {
for(double[] xy : coords) {
addPoint(xy[0], xy[1]);
}
}
// Add a Point object to the list
public void addPoint(Point point) {
polyline.add(point);
// Add the new point
}
// Add a point to the list
public void addPoint(double x, double y) {
polyline.add(new Point(x, y));
}
// String representation of a polyline
@Override
public String toString() {
StringBuffer str = new StringBuffer("Polyline:");
for(Point point : polyline) {
str.append(" " + point);
// Append the current point
}
return str.toString();
}
private LinkedList<Point> polyline = new LinkedList<>();
}
Directory "TryPolyLine"
