How to change draw dashed line with arrowhead (not straight)?

Question

Hi friends,
The following code sinept draws an arrowed line from a given point to the other point. I want to know how it can changed to be dashed line as well? I would appreciate it if anybody help me for doing such changes.
Thanks in advance,
Reza_mp
import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
public class ArrowExample extends JFrame
    enum ArrowHead {
        HEIGHT(10), WIDTH(10);
        int n;
        ArrowHead(int n) {this.n = n;}
        public int value() {return n;}
    java.util.List<Arrow> arrows;
    BasicStroke stroke;
    private class Arrow {
        Point start;
        Point end;
        Polygon arrowHead;
        public Arrow(Point start, Point end) {
            this.start = start;
            this.end = end;
            double direction = Math.atan2(end.y - start.y, end.x - start.x);
            System.out.println(direction * 180/Math.PI);
            arrowHead = new Polygon();
            arrowHead.addPoint(0, 0);
            Point p1 = rotate(ArrowHead.WIDTH.value()/2, ArrowHead.HEIGHT.value(), direction);
            arrowHead.addPoint(p1.x, p1.y);
            Point p2 = rotate(-ArrowHead.WIDTH.value()/2, ArrowHead.HEIGHT.value(), direction);
            arrowHead.addPoint(p2.x, p2.y);
            arrowHead.addPoint(0, 0);
            arrowHead.translate(end.x, end.y);
        public Point rotate(int x, int y, double dir) {
            Point p = new Point();
            double r = Math.sqrt(x*x + y*y);
            double theta = Math.atan2(y, x);
            p.setLocation(Math.round(r*Math.cos(theta + dir + Math.PI/2)),
                          Math.round(r*Math.sin(theta + dir + Math.PI/2)));
            return p;
        public void draw(Graphics2D g) {
            g.drawLine(start.x, start.y, end.x, end.y);
            g.drawPolygon(arrowHead);
            g.fillPolygon(arrowHead);
    public ArrowExample() {
        super("Arrows");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        JPanel p = new JPanel() {
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                Graphics2D g2d = (Graphics2D)g;
                Stroke oldStroke = g2d.getStroke();
                Color oldColor = g2d.getColor();
                g2d.setStroke(stroke);
                g2d.setColor(Color.black);
                for (Arrow a : arrows)
                    a.draw(g2d);
                g2d.setStroke(oldStroke);
                g2d.setColor(oldColor);
        p.setBackground(Color.white);
        add(p, BorderLayout.CENTER);
        stroke = new BasicStroke(3);
        arrows = new ArrayList<Arrow>();
        arrows.add(new Arrow(new Point(10,10), new Point(100,100)));
        arrows.add(new Arrow(new Point(300,10), new Point(300,100)));
        arrows.add(new Arrow(new Point(450,450), new Point(400,100)));
        pack();
        setSize(500, 500);
    public static void main(String[] args) {
        setDefaultLookAndFeelDecorated(true);
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new ArrowExample().setVisible(true);
}

Answer 1

Change the draw method as follows:
        public void draw(Graphics2D g) {
            Stroke s = g.getStroke();
            g.setStroke( new BasicStroke( 3.0f, BasicStroke.CAP_BUTT,
               BasicStroke.JOIN_MITER, 1.0f, new float[] { 10.0f, 10.0f }, 0.0f ) );
            g.drawLine(start.x, start.y, end.x, end.y);
            g.setStroke( s );
            g.drawPolygon(arrowHead);
            g.fillPolygon(arrowHead);
        }