RGB(红绿蓝)0-255全0就是黑色，全是最高255就是白色。//第一步类package cn.bjsxt.test;import java.awt.Color;import java.awt.Font;import java.awt.Frame;import java.awt.Graphics;import java.awt.Image;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;/** * 游戏基本知识测试类 * @author dell * */public class GameFrame extends Frame {
   //GUI编程：AWT,swing等，AWT是落后了的，AWT不用学不是重点。java不擅长写桌面（windows）软件，擅长写手机软件和服务器端软件。    Image img = GameUtil.getImage("images/sun.jpg");    /**     * 加载窗口     */    public void launchFrame(){        setSize(1000, 500);//画窗口要定义宽度和高度，        setLocation(100, 100);//定义位置，窗口的左上角的坐标（相对于window桌面的左上角）        setVisible(true);//窗口可见了                        new PaintThread().start();  //启动重画的线程                //增加一个窗口监听        addWindowListener(new WindowAdapter() {
   //WindowAdapter是匿名内部类，申明和使用在一起。            @Override            public void windowClosing(WindowEvent e) {
   //匿名内部类里面重写方法                System.exit(0);//结束当前运行虚拟机            }                    });    }        private double x=100,y=100;        @Override    public void paint(Graphics g) {
   //在窗口画东西要重写父类的方法，g就是一支笔一样。        g.drawLine(100, 100, 200, 200);//画线，起点和终点坐标（这是以窗口的左上角为起点的，而这个窗口的坐标是以window桌面的左上角为起点的）        g.drawRect(100, 100, 200, 200);//画矩形        g.drawOval(100, 100, 200, 200);//画圆                Font f =new Font("楷体",Font.BOLD,100);        g.setFont(f);                g.drawString("我是尚学堂高琪", 200, 200);//画一个字符串                g.fillRect(100, 100, 20, 20);//画一个实心矩形                Color c = g.getColor();//保存原来的颜色        g.setColor(Color.red);//改画笔的颜色        g.fillOval(300, 300, 20, 20);        g.setColor(c);//改完之后又回复之前的颜色                g.drawImage(img, (int)x, (int)y, null);//图图片，图片画的坐标。                x += 3;        y += 3;    }    /**     * 定义一个重画窗口的线程类，是一个内部类     * @author dell     *     */    class PaintThread extends Thread {                public void run(){
   //重写父类的方法            while(true){
   //一直画，直到程序关掉                repaint();                try {                    Thread.sleep(10); //1s = 1000ms，歇一会，不然cpu撑不住。                } catch (InterruptedException e) {                    e.printStackTrace();                }            }        }            }        public static void main(String[] args) {        GameFrame gf = new GameFrame();        gf.launchFrame();    }    }package cn.bjsxt.test;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.IOException;import java.net.URL;public class GameUtil {        private GameUtil(){}  //工具类最好将构造器私有，里面的方法是静态方法。这样就不会new出一个对象，而是直接调用静态方法。        public static Image getImage(String path){        BufferedImage bi=null;        try {            URL u = GameUtil.class.getClassLoader().getResource(path);//返回url对象            System.out.println(u);            bi = javax.imageio.ImageIO.read(u);        } catch (IOException e) {            e.printStackTrace();        }        return bi;//BufferedImage是Image的子类，所以可以返回。    }}

 

package cn.bjsxt.solar;import java.awt.Color;import java.awt.Graphics;import java.awt.Image;import cn.bjsxt.util.GameUtil;public class Planet extends Star {    //除了图片，坐标。 行星沿着某个椭圆运行：长轴、短轴、速度、角度。 绕着某个Star飞。    double longAxis;  //椭圆的长轴    double shortAxis;  //椭圆的短轴    double speed;     //飞行的速度    double degree;        Star center;        boolean satellite;            public void draw(Graphics g){        super.draw(g);        move();        if(!satellite){            drawTrace(g);        }    }        public void drawTrace(Graphics g){        double ovalX,ovalY,ovalWidth,ovalHeight;                ovalWidth = longAxis*2;        ovalHeight = shortAxis*2;        ovalX = (center.x+center.width/2)-longAxis;        ovalY = (center.y+center.height/2)-shortAxis;                Color c =g.getColor();        g.setColor(Color.blue);        g.drawOval((int)ovalX, (int)ovalY, (int)ovalWidth, (int)ovalHeight);        g.setColor(c);    }    public void move(){        //沿着椭圆轨迹飞行        x = (center.x+center.width/2) + longAxis*Math.cos(degree);        y = (center.y+center.height/2)+ shortAxis*Math.sin(degree);                degree += speed;    }                public Planet(Star center,String imgpath, double longAxis,            double shortAxis, double speed) {        super(GameUtil.getImage(imgpath));                        this.center = center;        this.x = center.x + longAxis;        this.y = center.y;                this.longAxis = longAxis;        this.shortAxis = shortAxis;        this.speed = speed;                this.width = img.getWidth(null);        this.height = img.getHeight(null);    }        public Planet(Star center,String imgpath, double longAxis,            double shortAxis, double speed,boolean satellite) {        this(center, imgpath, longAxis, shortAxis, speed);        this.satellite = satellite;            }    public Planet(Image img, double x, double y) {        super(img, x, y);    }    public Planet(String imgpath, double x, double y) {        super(imgpath, x, y);    }        }package cn.bjsxt.solar;import java.awt.Graphics;import java.awt.Image;import cn.bjsxt.util.Constant;import cn.bjsxt.util.GameUtil;import cn.bjsxt.util.MyFrame;/** * 太阳系的主窗口 * @author dell * */public class SolarFrame extends MyFrame {    Image bg = GameUtil.getImage("images/bg.jpg");    Star sun = new Star("images/sun.jpg", Constant.GAME_WIDTH/2, Constant.GAME_HEIGHT/2);    Planet earth = new Planet(sun, "images/earth.jpg", 150, 100, 0.1);    Planet moon = new Planet(earth, "images/moon.jpg", 30, 20, 0.3,true);    Planet mars = new Planet(sun, "images/Mars.jpg", 200, 130, 0.2);            public void paint(Graphics g){        g.drawImage(bg, 0, 0, null);        sun.draw(g);        earth.draw(g);        mars.draw(g);        moon.draw(g);    }        public static void main(String[] args) {        new SolarFrame().launchFrame();    }}package cn.bjsxt.solar;import java.awt.Graphics;import java.awt.Image;import cn.bjsxt.util.GameUtil;public class Star {    Image img;    double x,y;    int width,height;        public void draw(Graphics g){        g.drawImage(img, (int)x, (int)y, null);    }        public Star(){    }        public Star(Image img){        this.img = img;        this.width = img.getWidth(null);        this.height = img.getHeight(null);            }        public Star(Image img,double x,double y){        this(img);        this.x = x;        this.y = y;            }        public Star(String imgpath,double x,double y){        this(GameUtil.getImage(imgpath), x, y);   //通过this调用另一个构造方法    }        }package cn.bjsxt.util;/** * 游戏项目中用到的常量 * @author dell * */public class Constant {    public static final int GAME_WIDTH = 800;    public static final int GAME_HEIGHT = 600;    }package cn.bjsxt.util;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.IOException;import java.net.URL;public class GameUtil {        private GameUtil(){}  //工具类最好将构造器私有了。        public static Image getImage(String path){        BufferedImage bi=null;        try {            URL u = GameUtil.class.getClassLoader().getResource(path);            System.out.println(u);             bi = javax.imageio.ImageIO.read(u);        } catch (IOException e) {            e.printStackTrace();        }        return bi;    }}package cn.bjsxt.util;import java.awt.Frame;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class MyFrame  extends Frame {        /**     * 加载窗口     */    public void launchFrame(){        setSize(Constant.GAME_WIDTH, Constant.GAME_HEIGHT);        setLocation(100, 100);        setVisible(true);                new PaintThread().start();  //启动重画线程                addWindowListener(new WindowAdapter() {            @Override            public void windowClosing(WindowEvent e) {                System.exit(0);            }        });    }        /**     * 定义一个重画窗口的线程类，是一个内部类     * @author dell     *     */    class PaintThread extends Thread {                public void run(){            while(true){                repaint();                try {                    Thread.sleep(40); //1s = 1000ms                } catch (InterruptedException e) {                    e.printStackTrace();                }               }        }            }}