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);

}

}