trypolyline.java

Java2入门经典第二章源码

public class TryPolyLine
{
  public static void main(String[] args)
  {
    // Create an array of coordinate pairs
    double[][] coords = { {1., 1.}, {1., 2.}, { 2., 3.},
                          {-3., 5.}, {-5., 1.}, {0., 0.} };

    // Create a polyline from the coordinates and display it
    PolyLine polygon = new PolyLine(coords);
    System.out.println(polygon);

    // Add a point and display the polyline again
    polygon.addPoint(10., 10.);
    System.out.println(polygon);

    // Create Point objects from the coordinate array
    Point[] points = new Point[coords.length];
    for(int i = 0; i < points.length; i++)
      points[i] = new Point(coords[i][0],coords[i][1]);

    // Use the points to create a new polyline and display it
    PolyLine newPoly = new PolyLine(points);
    System.out.println(newPoly);
  }
}