Java2D范例 ——创建一副地图

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Arc2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.GeneralPath;
import java.awt.geom.Rectangle2D;
import java.awt.geom.Ellipse2D.Float;


import javax.swing.JFrame;
import javax.swing.JPanel;




public class Map extends JFrame {

Map()
{
super("Map");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(360,350);
MapPanel map = new MapPanel();
add(map);
setVisible(true);

}


public static void main(String[] args) {
// TODO Auto-generated method stub


Map frame = new Map();
}


}


class MapPanel extends JPanel
{
public void paintComponent(Graphics comp)
{

Graphics2D comp2D = (Graphics2D)comp;
comp2D.setColor(Color.blue);
comp2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Rectangle2D.Float background = new Rectangle2D.Float(0F,0F,(float)getSize().width,(float)getSize().height);
comp2D.fill(background);
comp2D.setColor(Color.white);
BasicStroke pen = new BasicStroke(2F,BasicStroke.CAP_BUTT,BasicStroke.JOIN_ROUND);
comp2D.setStroke(pen);

for(int ax=0;ax < 340; ax+=10)
{

for(int ay=0;ay < 340; ay+=10)
{
Arc2D.Float wave = new Arc2D.Float(ax,ay,10,10,0,-180,Arc2D.OPEN);
  comp2D.draw(wave);
}
}

GradientPaint gp = new GradientPaint(0F, 0F,Color.green, 350F, 350F, Color.orange,true);

comp2D.setPaint(gp);
GeneralPath f1 = new GeneralPath();
f1.moveTo(10F, 12F);
f1.lineTo(234F, 15F);
   f1.lineTo(253F, 25F);
   f1.lineTo(261F, 71F);
   f1.lineTo(344F, 209F);
   f1.lineTo(336F, 278F);
   f1.lineTo(295F, 310F);
   f1.lineTo(259F, 274F);
   f1.lineTo(205F, 188F);
   f1.lineTo(211F, 171F);
   f1.lineTo(120F, 56F);
   f1.lineTo(94F, 68F);
   f1.lineTo(81F, 69F);
   f1.lineTo(12F, 37F);
   f1.closePath();
   comp2D.fill(f1);
   
   comp2D.setColor(Color.black);
   BasicStroke pen2 = new BasicStroke();
   comp2D.setStroke(pen2);
   Ellipse2D.Float e1 = new Ellipse2D.Float(235,140,15,15);
   Ellipse2D.Float e2 = new Ellipse2D.Float(225,130,15,15);
   Ellipse2D.Float e3 = new Ellipse2D.Float(245,130,15,15);
   comp2D.fill(e1);
   comp2D.fill(e2);
   comp2D.fill(e3);



}
}