Java实例---flappy-bird实例[最终版]

package testfly; import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferedImage;
import java.util.Random; import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TestBirdFly extends JPanel {
Bird bird;
Column column1, column2;
Ground ground;
BufferedImage background;
boolean gameOver;
boolean started;
BufferedImage gameoverImg;
//分数
int score;
/** 初始化 BirdGame 的属性变量 */
public TestBirdFly() throws Exception {
score = 0;
bird = new Bird();
column1 = new Column(1);
column2 = new Column(2);
ground = new Ground();
gameOver=false;
background = ImageIO.read(
getClass().getResource("bg.png"));
gameoverImg= ImageIO.read(
getClass().getResource("gameover.png"));
} /** "重写(修改)"paint方法实现绘制 */
public void paint(Graphics g){
g.drawImage(background, 0, 0, null);
g.drawImage(column1.image,
column1.x-column1.width/2,
column1.y-column1.height/2, null);
g.drawImage(column2.image,
column2.x-column2.width/2,
column2.y-column2.height/2, null);
//在paint方法中添加绘制分数的算法
Font f = new Font(Font.SANS_SERIF,
Font.BOLD, 40);
g.setFont(f);
g.drawString(""+score, 40, 60);
g.setColor(Color.WHITE);
g.drawString(""+score, 40-3, 60-3); g.drawImage(ground.image, ground.x,
ground.y, null);
if (gameOver){
g.drawImage(gameoverImg,0,0,null);
return;
}
//旋转(rotate)绘图坐标系，是API方法
Graphics2D g2 = (Graphics2D)g;
g2.rotate(-bird.alpha, bird.x, bird.y);
g.drawImage(bird.image,
bird.x-bird.width/2,
bird.y-bird.height/2, null);
g2.rotate(bird.alpha, bird.x, bird.y);
}//paint方法的结束
//BirdGame中添加方法action()
public void action() throws Exception {
MouseListener l=new MouseAdapter(){
//Mouse 老鼠 Pressed按下
public void mousePressed(
MouseEvent e){
//鸟向上飞扬
started=true;
bird.flappy(); }
};
//将l挂接到当前的面板（game）上
addMouseListener(l); while(true){ //计分逻辑
if(!gameOver||started){
ground.step();
column1.step();
column2.step();
bird.step();
}
bird.fly();
ground.step(); if(bird.hit(ground) ||bird.hit(column1)||bird.hit(column2)){
gameOver=true;
}
bird.fly();
if (bird.x==column1.x||bird.x==column2.x){
score++;
}repaint(); Thread.sleep(1000/60);
}
} /** 启动软件的方法 */
public static void main(String[] args)
throws Exception {
JFrame frame = new JFrame();
TestBirdFly game = new TestBirdFly();
frame.add(game);
frame.setSize(440, 670);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(
JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
game.action();
}
}
/** 地面 */
class Ground{
BufferedImage image;
int x, y;
int width;
int height;
public Ground() throws Exception {
image = ImageIO.read(
getClass().getResource("ground.png"));
width = image.getWidth();
height = image.getHeight();
x = 0;
y = 500;
}//地面的构造器结束
//地面的类体中,添加方法，地面移动一步
public void step(){
x--;
if(x==-109){
x = 0;
}
}
}//地面类的结束
/** 柱子类型，x,y是柱子的中心点的位置 */
class Column{
BufferedImage image;
int x,y;
int width, height;
/** 柱子中间的缝隙 */
int gap;
int distance;//距离，两个柱子之间的距离
Random random = new Random();
/** 构造器：初始化数据，n代表第几个柱子 */
public Column(int n) throws Exception {
image=ImageIO.read(
getClass().getResource("column.png"));
width = image.getWidth();
height = image.getHeight();
gap=144;
distance = 245;
x = 550+(n-1)*distance;
y = random.nextInt(218)+132;
}
//在Column中添加方法 step，在action调用此方法
public void step(){
x--;
if(x==-width/2){
x = distance * 2 - width/2;
y = random.nextInt(218)+132;
}
}
}//Column类的结束
/** 鸟类型, x,y是鸟类型中心的位置 */
class Bird{
BufferedImage image;
int x,y;
int width, height;
int size;//鸟的大小，用于碰撞检测 //在Bird类中增加属性，用于计算鸟的位置
double g;// 重力加速度
double t;// 两次位置的间隔时间
double v0;// 初始上抛速度
double speed;// 是当前的上抛速度
double s;// 是经过时间t以后的位移
double alpha;// 是鸟的倾角 弧度单位
//在Bird类中定义
//定义一组（数组）图片，是鸟的动画帧
BufferedImage[] images;
//是动画帧数组元素的下标位置
int index; public Bird() throws Exception {
image=ImageIO.read(
getClass().getResource("0.png"));
width = image.getWidth();
height = image.getHeight();
x = 132;
y = 280;
size = 10;
g = 1;
v0 = 10;
t = 0.25;
speed = v0;
s = 0;
alpha=0;
//创建数组,创建8个元素的数组
//是8个空位置，没有图片对象，
//8个位置的序号: 0 1 2 3 4 5 6 7
images = new BufferedImage[8];
for(int i=0; i<8; i++){
//i = 0 1 2 3 4 5 6 7
images[i] = ImageIO.read(
getClass().getResource(i+".png"));
}
index = 0;
}
//在Bird中添加飞翔(fly)的代码
public void fly(){
index++;
image = images[(index/12) % 8];
}
//在Bird中添加鸟的移动方法
public void step(){
double v0 = speed;
s = v0*t + g*t*t/2;//计算上抛运动位移
y = y-(int)s;//计算鸟的坐标位置
double v = v0 - g*t;//计算下次的速度
speed = v;
// if(y>=500){//如果到达地面，就重新抛起
// y = 280;
// speed = 35;
// }
//调用Java API提供的反正切函数，计算倾角
alpha = Math.atan(s/8);
}
//在Bird中添加方法
public void flappy(){
//重新设置初始速度，重新向上飞
speed = v0;
}
//在鸟中添加方法hit
// 检测当前鸟是否碰到地面ground
//如果返回true表示发生碰撞
//否则返回false表示没有碰撞 public boolean hit (Ground ground){
boolean hit =y+size/2>ground.y;
if(hit){
y=ground.y-size/2; }
return hit;
}
//检测当前鸟是否撞倒柱子
public boolean hit(Column column){
//先检查是否在柱子的范围以内
if (x>column.x-column.width/2-size/2&&x<column
.x+column.width/2+size/2){
if(y>column.y-column.gap/2+size/2&&y<column.y+column.gap/2-size/2){
return false; }
return true; }
return false;
}
}