RGB(红绿蓝)-
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(, );//画窗口要定义宽度和高度，
setLocation(, );//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();//结束当前运行虚拟机
}
});
}
private double x=,y=;
@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(, , , );//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(, , , );//画矩形
g.drawOval(, , , );//画圆
Font f =new Font("楷体",Font.BOLD,);
g.setFont(f);
g.drawString("我是尚学堂高琪", , );//画一个字符串
g.fillRect(, , , );//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(, , , );
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 += ;
y += ;
}
/**
* 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(); //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*;
ovalHeight = shortAxis*;
ovalX = (center.x+center.width/)-longAxis;
ovalY = (center.y+center.height/)-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/) + longAxis*Math.cos(degree);
y = (center.y+center.height/)+ 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/, Constant.GAME_HEIGHT/);
Planet earth = new Planet(sun, "images/earth.jpg", , , 0.1);
Planet moon = new Planet(earth, "images/moon.jpg", , , 0.3,true);
Planet mars = new Planet(sun, "images/Mars.jpg", , , 0.2);
public void paint(Graphics g){
g.drawImage(bg, , , 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 = ;
public static final int GAME_HEIGHT = ;
}
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(, );
setVisible(true);
new PaintThread().start(); //启动重画线程
addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit();
}
});
}
/**
* 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(); //1s = 1000ms
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}