J2ME游戏开发实例讲解01

　　Draw类的源代码如下：

　　package huarongroad;
import javax.microedition.lcdui.*;
public class Draw {
//绘制游戏中的图片
public Draw(Canvas canvas) {//构造函数
}
public static boolean paint(Graphics g, byte img, int x, int y) {
//在地图的x,y点绘制img指定的图片
try {
paint(g, img, x, y, Images.UNIT);//把地图x,y点转化成画布的绝对坐标，绘图
return true;
}
catch (Exception ex) {
return false;
}
}
public static boolean paint(Graphics g, byte img, int x, int y, int unit) {
try {
switch (img) {
case Images.CAOCAO://画曹操
//变成绝对坐标，并做调整
g.drawImage(Images.image_Caocao, Images.LEFT + x * unit,
Images.TOP + y * unit,
Graphics.TOP | Graphics.LEFT);
break;
case Images.GUANYU://画关羽
g.drawImage(Images.image_Guanyu, Images.LEFT + x * unit,
Images.TOP + y * unit,
Graphics.TOP | Graphics.LEFT);
break;
case Images.HUANGZHONG://画黄忠
g.drawImage(Images.image_Huangzhong, Images.LEFT + x * unit,
Images.TOP + y * unit,
Graphics.TOP | Graphics.LEFT);
break;
case Images.MACHAO://画马超
g.drawImage(Images.image_Machao, Images.LEFT + x * unit,
Images.TOP + y * unit,
Graphics.TOP | Graphics.LEFT);
break;
case Images.ZHANGFEI://画张飞
g.drawImage(Images.image_Zhangfei, Images.LEFT + x * unit,
Images.TOP + y * unit,
Graphics.TOP | Graphics.LEFT);
break;
case Images.ZHAOYUN://画赵云
g.drawImage(Images.image_Zhaoyun, Images.LEFT + x * unit,
Images.TOP + y * unit,
Graphics.TOP | Graphics.LEFT);
break;
case Images.ZU://画卒
g.drawImage(Images.image_Zu, Images.LEFT + x * unit,
Images.TOP + y * unit,
Graphics.TOP | Graphics.LEFT);
break;
case Images.BLANK://画空白
g.drawImage(Images.image_Blank, Images.LEFT + x * unit,
Images.TOP + y * unit,
Graphics.TOP | Graphics.LEFT);
break;
case Images.CURSOR://画光标
g.drawRect(Images.LEFT + x * unit,
Images.TOP + y * unit,Images.UNIT,Images.UNIT);
break;
}
return true;
}catch (Exception ex) {
return false;
}
}
}