canvas游戏源码

① cocos creator见缝插针源码游戏结束的代码逻辑

别玩游戏

② 求一段java编写的贪吃蛇小程序源代码

用MVC方式实现的贪吃蛇游戏，共有4个类。运行GreedSnake运行即可。主要是观察者模式的使用，我已经添加了很多注释了。
1、
/*
* 程序名称：贪食蛇
* 原作者：BigF
* 修改者：algo
* 说明：我以前也用C写过这个程序，现在看到BigF用Java写的这个，发现虽然作者自称是Java的初学者，
* 但是明显编写程序的素养不错，程序结构写得很清晰，有些细微得地方也写得很简洁，一时兴起之
* 下，我认真解读了这个程序，发现数据和表现分开得很好，而我近日正在学习MVC设计模式，
* 因此尝试把程序得结构改了一下，用MVC模式来实现，对源程序得改动不多。
* 我同时也为程序增加了一些自己理解得注释，希望对大家阅读有帮助。
*/

package mvcTest;

/**
* @author WangYu
* @version 1.0
* Description:
* </pre>
* Create on :Date :2005-6-13 Time:15:57:16
* LastModified:
* History:
*/
public class GreedSnake {
public static void main(String[] args) {
SnakeModel model = new SnakeModel(20,30);
SnakeControl control = new SnakeControl(model);
SnakeView view = new SnakeView(model,control);
//添加一个观察者，让view成为model的观察者
model.addObserver(view);

(new Thread(model)).start();
}
}

-------------------------------------------------------------
2、

package mvcTest;

//SnakeControl.java
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

/**
* MVC中的Controler，负责接收用户的操作，并把用户操作通知Model
*/
public class SnakeControl implements KeyListener{
SnakeModel model;

public SnakeControl(SnakeModel model){
this.model = model;
}

public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();
if (model.running){ // 运行状态下，处理的按键
switch (keyCode) {
case KeyEvent.VK_UP:
model.changeDirection(SnakeModel.UP);
break;
case KeyEvent.VK_DOWN:
model.changeDirection(SnakeModel.DOWN);
break;
case KeyEvent.VK_LEFT:
model.changeDirection(SnakeModel.LEFT);
break;
case KeyEvent.VK_RIGHT:
model.changeDirection(SnakeModel.RIGHT);
break;
case KeyEvent.VK_ADD:
case KeyEvent.VK_PAGE_UP:
model.speedUp();
break;
case KeyEvent.VK_SUBTRACT:
case KeyEvent.VK_PAGE_DOWN:
model.speedDown();
break;
case KeyEvent.VK_SPACE:
case KeyEvent.VK_P:
model.changePauseState();
break;
default:
}
}

// 任何情况下处理的按键，按键导致重新启动游戏
if (keyCode == KeyEvent.VK_R ||
keyCode == KeyEvent.VK_S ||
keyCode == KeyEvent.VK_ENTER) {
model.reset();
}
}

public void keyReleased(KeyEvent e) {
}

public void keyTyped(KeyEvent e) {
}
}
-------------------------------------------------------------
3、
/*
*
*/

package mvcTest;

/**
* 游戏的Model类，负责所有游戏相关数据及运行
* @author WangYu
* @version 1.0
* Description:
* </pre>
* Create on :Date :2005-6-13 Time:15:58:33
* LastModified:
* History:
*/
//SnakeModel.java
import javax.swing.*;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.Observable;
import java.util.Random;

/**
* 游戏的Model类，负责所有游戏相关数据及运行
*/
class SnakeModel extends Observable implements Runnable {
boolean[][] matrix; // 指示位置上有没蛇体或食物
LinkedList nodeArray = new LinkedList(); // 蛇体
Node food;
int maxX;
int maxY;
int direction = 2; // 蛇运行的方向
boolean running = false; // 运行状态

int timeInterval = 200; // 时间间隔，毫秒
double speedChangeRate = 0.75; // 每次得速度变化率
boolean paused = false; // 暂停标志

int score = 0; // 得分
int countMove = 0; // 吃到食物前移动的次数

// UP and DOWN should be even
// RIGHT and LEFT should be odd
public static final int UP = 2;
public static final int DOWN = 4;
public static final int LEFT = 1;
public static final int RIGHT = 3;

public SnakeModel( int maxX, int maxY) {
this.maxX = maxX;
this.maxY = maxY;

reset();
}

public void reset(){
direction = SnakeModel.UP; // 蛇运行的方向
timeInterval = 200; // 时间间隔，毫秒
paused = false; // 暂停标志
score = 0; // 得分
countMove = 0; // 吃到食物前移动的次数

// initial matirx, 全部清0
matrix = new boolean[maxX][];
for (int i = 0; i < maxX; ++i) {
matrix[i] = new boolean[maxY];
Arrays.fill(matrix[i], false);
}

// initial the snake
// 初始化蛇体，如果横向位置超过20个，长度为10，否则为横向位置的一半
int initArrayLength = maxX > 20 ? 10 : maxX / 2;
nodeArray.clear();
for (int i = 0; i < initArrayLength; ++i) {
int x = maxX / 2 + i;//maxX被初始化为20
int y = maxY / 2; //maxY被初始化为30
//nodeArray[x,y]: [10,15]-[11,15]-[12，15]~~[20,15]
//默认的运行方向向上，所以游戏一开始nodeArray就变为：
// [10，14]-[10，15]-[11，15]-[12，15]~~[19，15]
nodeArray.addLast(new Node(x, y));
matrix[x][y] = true;
}

// 创建食物
food = createFood();
matrix[food.x][food.y] = true;
}

public void changeDirection(int newDirection) {
// 改变的方向不能与原来方向同向或反向
if (direction % 2 != newDirection % 2) {
direction = newDirection;
}
}

/**
* 运行一次
* @return
*/
public boolean moveOn() {
Node n = (Node) nodeArray.getFirst();
int x = n.x;
int y = n.y;

// 根据方向增减坐标值
switch (direction) {
case UP:
y--;
break;
case DOWN:
y++;
break;
case LEFT:
x--;
break;
case RIGHT:
x++;
break;
}

// 如果新坐标落在有效范围内，则进行处理
if ((0 <= x && x < maxX) && (0 <= y && y < maxY)) {

if (matrix[x][y]) { // 如果新坐标的点上有东西（蛇体或者食物）
if (x == food.x && y == food.y) { // 吃到食物，成功
nodeArray.addFirst(food); // 从蛇头赠长

// 分数规则，与移动改变方向的次数和速度两个元素有关
int scoreGet = (10000 - 200 * countMove) / timeInterval;
score += scoreGet > 0 ? scoreGet : 10;
countMove = 0;

food = createFood(); // 创建新的食物
matrix[food.x][food.y] = true; // 设置食物所在位置
return true;
} else // 吃到蛇体自身，失败
return false;

} else { // 如果新坐标的点上没有东西（蛇体），移动蛇体
nodeArray.addFirst(new Node(x, y));
matrix[x][y] = true;
n = (Node) nodeArray.removeLast();
matrix[n.x][n.y] = false;
countMove++;
return true;
}
}
return false; // 触到边线，失败
}

public void run() {
running = true;
while (running) {
try {
Thread.sleep(timeInterval);
} catch (Exception e) {
break;
}

if (!paused) {
if (moveOn()) {
setChanged(); // Model通知View数据已经更新
notifyObservers();
} else {
JOptionPane.showMessageDialog(null,
"you failed",
"Game Over",
JOptionPane.INFORMATION_MESSAGE);
break;
}
}
}
running = false;
}

private Node createFood() {
int x = 0;
int y = 0;
// 随机获取一个有效区域内的与蛇体和食物不重叠的位置
do {
Random r = new Random();
x = r.nextInt(maxX);
y = r.nextInt(maxY);
} while (matrix[x][y]);

return new Node(x, y);
}

public void speedUp() {
timeInterval *= speedChangeRate;
}

public void speedDown() {
timeInterval /= speedChangeRate;
}

public void changePauseState() {
paused = !paused;
}

public String toString() {
String result = "";
for (int i = 0; i < nodeArray.size(); ++i) {
Node n = (Node) nodeArray.get(i);
result += "[" + n.x + "," + n.y + "]";
}
return result;
}
}

class Node {
int x;
int y;

Node(int x, int y) {
this.x = x;
this.y = y;
}
}
------------------------------------------------------------
4、

package mvcTest;

//SnakeView.java
import javax.swing.*;
import java.awt.*;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Observable;
import java.util.Observer;

/**
* MVC模式中得Viewer，只负责对数据的显示,而不用理会游戏的控制逻辑
*/
public class SnakeView implements Observer {
SnakeControl control = null;
SnakeModel model = null;

JFrame mainFrame;
Canvas paintCanvas;
JLabel labelScore;

public static final int canvasWidth = 200;
public static final int canvasHeight = 300;

public static final int nodeWidth = 10;
public static final int nodeHeight = 10;

public SnakeView(SnakeModel model, SnakeControl control) {
this.model = model;
this.control = control;

mainFrame = new JFrame("GreedSnake");

Container cp = mainFrame.getContentPane();

// 创建顶部的分数显示
labelScore = new JLabel("Score:");
cp.add(labelScore, BorderLayout.NORTH);

// 创建中间的游戏显示区域
paintCanvas = new Canvas();
paintCanvas.setSize(canvasWidth + 1, canvasHeight + 1);
paintCanvas.addKeyListener(control);
cp.add(paintCanvas, BorderLayout.CENTER);

// 创建底下的帮助栏
JPanel panelButtom = new JPanel();
panelButtom.setLayout(new BorderLayout());
JLabel labelHelp;
labelHelp = new JLabel("PageUp, PageDown for speed;", JLabel.CENTER);
panelButtom.add(labelHelp, BorderLayout.NORTH);
labelHelp = new JLabel("ENTER or R or S for start;", JLabel.CENTER);
panelButtom.add(labelHelp, BorderLayout.CENTER);
labelHelp = new JLabel("SPACE or P for pause", JLabel.CENTER);
panelButtom.add(labelHelp, BorderLayout.SOUTH);
cp.add(panelButtom, BorderLayout.SOUTH);

mainFrame.addKeyListener(control);
mainFrame.pack();
mainFrame.setResizable(false);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setVisible(true);
}

void repaint() {
Graphics g = paintCanvas.getGraphics();

//draw background
g.setColor(Color.WHITE);
g.fillRect(0, 0, canvasWidth, canvasHeight);

// draw the snake
g.setColor(Color.BLACK);
LinkedList na = model.nodeArray;
Iterator it = na.iterator();
while (it.hasNext()) {
Node n = (Node) it.next();
drawNode(g, n);
}

// draw the food
g.setColor(Color.RED);
Node n = model.food;
drawNode(g, n);

updateScore();
}

private void drawNode(Graphics g, Node n) {
g.fillRect(n.x * nodeWidth,
n.y * nodeHeight,
nodeWidth - 1,
nodeHeight - 1);
}

public void updateScore() {
String s = "Score: " + model.score;
labelScore.setText(s);
}

public void update(Observable o, Object arg) {
repaint();
}
}
希望采纳

③ 贪吃蛇游戏的源代码

？

贪吃蛇源码：

<!doctype html>
<html>
<body style='overflow:hidden'>
<canvas id="can" width="400" height="400" style="background:Black;display: block;margin:20px auto;"></canvas>
<script>
var sn = [ 42, 41 ], dz = 43, fx = 1, n, ctx = document.getElementById("can").getContext("2d");
function draw(t, c) {
ctx.fillStyle = c;
ctx.fillRect(t % 20 * 20 + 1, ~~(t / 20) * 20 + 1, 18, 18);
}
document.onkeydown = function(e) {
fx = sn[1] - sn[0] == (n = [ -1, -20, 1, 20 ][(e || event).keyCode - 37] || fx) ? fx : n
};
!function() {
sn.unshift(n = sn[0] + fx);
if (sn.indexOf(n, 1) > 0 || n<0||n>399 || fx == 1 && n % 20 == 0 || fx == -1 && n % 20 == 19)
return alert("GAME OVER");
draw(n, "Lime");
if (n == dz) {
while (sn.indexOf(dz = ~~(Math.random() * 400)) >= 0);
draw(dz, "Yellow");
} else
draw(sn.pop(), "Black");
setTimeout(arguments.callee, 130);
}();
</script>
</body>
</html>

④ UGUI笔记——Canvas,CanvasScaler,GraphicRaycaster

我们在Unity创建一个Canvas游戏对象,会默认添加Canvas,CanvasScaler,GraphicRaycaster这三个组件，下面会详细介绍一下各个组租源件的作用。

Canvas 组件是UI布局和渲染的抽象空间，所有的UI都必须在此元素之下(子物件)，简单来说 Canvas 就是渲染 UI 的组件。
UI渲染的方式（Render Mode）型戚，有以下三种

GraphicRaycaster会观察 Canvas下所有图形，并检测是否被击中，射线检测其实就是指定位置与方向后，投射一条隐形线并判断是否有碰撞体在线上，用于判断是否点选到UI上。

举例：如果画面上有一个 Button 与 Cube 位置故意重叠，现在点击重叠之处会发现 Button 还是会被触发。

Blocked Objects 设定为 Three D，再次点选重叠区域，会发现 Cube 会阻碍射线检测，此时按钮不会有反应

Canvas Scaler是Unity UI系统中，控制UI元素大小和像素密度的组件，Canvas Scaler的缩放比例影响Canvas下的元素，包含字体大小和图像边界。

可以看出，Canvas Scaler 通过设置Canvas下的Scale Factor，缩放所有在此Canvas下的元素

Canvas Size 始终等于 Screen Size，通过Scale Factor直接缩放所有UI元素

介绍Reference Pixels Per Unit之前需要先介绍图片设置中的Pixels Per Unit(表示一张Sprite，在世界坐标中一单位由几个Pixel组成）

这里使用的测试图片为原始尺寸100*100 的图片

由此可以推导出公式： Sprite 在世界坐标中大小 = 原图大小(Pixels) / Pixels Per Unit

让我们回到 Reference Pixels Per Unit，官方解释是，如果图片有设置Pixels Per Unit，则会将Sprite 的 1 pixel 转换成 UI 中的 1 pixel，下面将以Image源码说明：

可以看出 Image 通过过 spritePixelsPerUnit / referencePixelsPerUnit 方式算出新的 pixelsPerUnit

在设定 Image 图片大小时，是把 Sprite宽高卜型陵 / pixelsPerUnit

由此可以推导出公式： UI大小 = 原图大小(Pixels) / (Pixels Per Unit / Reference Pixels Per Unit)
或者 UI大小 = Sprite 在世界坐标中大小 * Reference Pixels Per Unit

通过设定的Reference Resolution(预设屏幕大小)来缩放

分别对ScaleFactor Width、Height取对数后，再进行平均混合，那为什麽不直接使用Match对Width、Height进行混合呢???让我们来比较一下

完整源码算法：

通过硬体设备的Dpi(Dots Per Inch 每英吋点数)，进行缩放

⑤ h5游戏源码如何修改样式没有css啊

看你这个架构 应该是用canvas画布做的, 没办法用css修改样式的, 只能在js里面找到相应的语句做修改

⑥ 请用python编一个小游戏，如五子棋，连连看，贪吃蛇，扫雷，计算器等等

#!/usr/bin/python
from Tkinter import *
import random
class snake(Frame):
def __init__(self, master=None):
Frame.__init__(self, master)
self.body = [(0,0)]
self.bodyid = []
self.food = [ -1, -1 ]
self.foodid = -1
self.gridcount = 10
self.size = 500
self.di = 3
self.speed = 500
self.top = self.winfo_toplevel()
self.top.resizable(False, False)
self.grid()
self.canvas = Canvas(self)
self.canvas.grid()
self.canvas.config(width=self.size, height=self.size,relief=RIDGE)
self.drawgrid()
s = self.size/self.gridcount
id = self.canvas.create_rectangle(self.body[0][0]*s,self.body[0][1]*s,
(self.body[0][0]+1)*s, (self.body[0][1]+1)*s, fill="yellow")
self.bodyid.insert(0, id)
self.bind_all("<KeyRelease>", self.keyrelease)
self.drawfood()
self.after(self.speed, self.drawsnake)
def drawgrid(self):
s = self.size/self.gridcount
for i in range(0, self.gridcount+1):
self.canvas.create_line(i*s, 0, i*s, self.size)
self.canvas.create_line(0, i*s, self.size, i*s)
def drawsnake(self):
s = self.size/self.gridcount
head = self.body[0]
new = [head[0], head[1]]
if self.di == 1:
new[1] = (head[1]-1) % self.gridcount
elif self.di == 2:
new[0] = (head[0]+1) % self.gridcount
elif self.di == 3:
new[1] = (head[1]+1) % self.gridcount
else:
new[0] = (head[0]-1) % self.gridcount
next = ( new[0], new[1] )
if next in self.body:
exit()
elif next == (self.food[0], self.food[1]):
self.body.insert(0, next)
self.bodyid.insert(0, self.foodid)
self.drawfood()
else:
tail = self.body.pop()
id = self.bodyid.pop()
self.canvas.move(id, (next[0]-tail[0])*s, (next[1]-tail[1])*s)
self.body.insert(0, next)
self.bodyid.insert(0, id)
self.after(self.speed, self.drawsnake)
def drawfood(self):
s = self.size/self.gridcount
x = random.randrange(0, self.gridcount)
y = random.randrange(0, self.gridcount)
while (x, y) in self.body:
x = random.randrange(0, self.gridcount)
y = random.randrange(0, self.gridcount)
id = self.canvas.create_rectangle(x*s,y*s, (x+1)*s, (y+1)*s, fill="yellow")
self.food[0] = x
self.food[1] = y
self.foodid = id
def keyrelease(self, event):
if event.keysym == "Up" and self.di != 3:
self.di = 1
elif event.keysym == "Right" and self.di !=4:
self.di = 2
elif event.keysym == "Down" and self.di != 1:
self.di = 3
elif event.keysym == "Left" and self.di != 2:
self.di = 4
app = snake()
app.master.title("Greedy Snake")
app.mainloop()

贪食蛇

⑦ HTML5围住神经猫

源码简介 相关最新源码
HTML5围住神经猫游戏网页版是一款基于HTML5 canvas、egret_loader.js和jquery.min.js等技术制作的围住神经猫网页版游戏源码。
游戏玩法：

游戏随机出现灰色圆点和橙色圆点，屏幕中央为一只扭动的神经猫。游戏要求通过触击灰色圆点从而变成橙色，使橙色圆点将神经猫四周全部包围起来，进而使其不能再行移动即为胜利。

⑧ 求一个安卓开发小游戏源代码，临时交作业用

package com.fiveChess;

import android.app.Activity;
import android.os.Bundle;
import android.view.Display;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends Activity {
GameView gameView = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
Display display = this.getWindowManager().getDefaultDisplay();
gameView = new GameView(this,display.getWidth(),display.getHeight());
setContentView(gameView);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add("重新开始").setIcon(android.R.drawable.ic_menu_myplaces);
menu.add("退出");
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getTitle().equals("重新开始")){
gameView.canPlay = true;
gameView.chess = new int[gameView.row][gameView.col];
gameView.invalidate();
}else if(item.getTitle().equals("退出")){
finish();
}
return super.onOptionsItemSelected(item);
}
}

package com.fiveChess;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.view.MotionEvent;
import android.view.View;

public class GameView extends View {
Context context = null;
int screenWidth,screenHeight;
String message = "";//提示轮到哪个玩家
int row,col; //划线的行数和列数
int stepLength = 30;//棋盘每格间距
int[][] chess = null;//0代表没有棋子，1代表是黑棋，2代表白旗
boolean isBlack = true;
boolean canPlay = true;
public GameView(Context context,int screenWidth,int screenHeight) {
super(context);
this.context = context;
this.screenWidth = screenWidth;
this.screenHeight = screenHeight;
this.message = "黑棋先行";
row = (screenHeight-50)/stepLength+1;
col = (screenWidth-10)/stepLength+1;
chess = new int[row][col];

}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
paint.setColor(Color.WHITE);
canvas.drawRect(0, 0, screenWidth, screenHeight, paint);//画背景
paint.setColor(Color.BLUE);
paint.setTextSize(25);
canvas.drawText(message, (screenWidth-100)/2, 30, paint);//画最顶层的字
paint.setColor(Color.BLACK);
//画棋盘
for(int i=0;i<row;i++){
canvas.drawLine(10, 50+i*stepLength, 10+(col-1)*stepLength, 50+i*stepLength, paint);
}
for(int i=0;i<col;i++){
canvas.drawLine(10+i*stepLength,50,10+i*stepLength,50+(row-1)*stepLength, paint);
}

for(int r=0;r<row;r++){
for(int c=0;c<col;c++){
if(chess[r][c] == 1){
paint.setColor(Color.BLACK);
paint.setStyle(Style.FILL);
canvas.drawCircle(10+c*stepLength, 50+r*stepLength, 10, paint);
}else if(chess[r][c] == 2){
//画白棋
paint.setColor(Color.WHITE);
paint.setStyle(Style.FILL);
canvas.drawCircle(10+c*stepLength, 50+r*stepLength, 10, paint);

paint.setColor(Color.BLACK);
paint.setStyle(Style.STROKE);
canvas.drawCircle(10+c*stepLength, 50+r*stepLength, 10, paint);
}
}
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if(!canPlay){return false;}
float x = event.getX();
float y = event.getY();
int r = Math.round((y-50)/stepLength);
int c = Math.round((x-10)/stepLength);
if(r<0 || r>row-1 || c<0 || c>col-1){return false;}
if(chess[r][c]!=0){return false;}//若有棋子则不再画棋子了
if(isBlack){
chess[r][c] = 1;
isBlack = false;
message = "轮到白棋";
}else{
chess[r][c] = 2;
isBlack = true;
message = "轮到黑棋";
}
invalidate();
if(judge(r, c,0,1)) return false;
if(judge(r, c,1,0)) return false ;
if(judge(r, c,1,1)) return false;
if(judge(r, c,1,-1)) return false;

return super.onTouchEvent(event);
}
private boolean judge(int r, int c,int x,int y) {//r，c表示行和列，x表示在y方向上的偏移，y表示在x方向上的偏移
int count = 1;
int a = r;
int b = c;
while(r>=0 && r<row && c>=0 && c<col && r+x>=0 && r+x<row && c+y>=0 && c+y<col && chess[r][c] == chess[r+x][c+y]){
count++;
if(y>0){
c++;
}else if(y<0){
c--;
}
if(x>0){
r++;
}else if(x<0){
r--;
}
}
while(a>=0 && a<row && b>=0 && b<col && a-x>=0 && a-x<row && b-y>=0 && b-y<col && chess[a][b] == chess[a-x][b-y]){
count++;
if(y>0){
b--;
}else if(y<0){
b++;
}
if(x>0){
a--;
}else if(x<0){
a++;
}
}
if(count>=5){
String str = "";
if(isBlack){
str = "白棋胜利";
}else{
str = "黑棋胜利";
}
new AlertDialog.Builder(context).setTitle("游戏结束").setMessage(str).setPositiveButton("重新开始", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
chess = new int[row][col];
invalidate();

}
}).setNegativeButton("观看棋局", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
canPlay = false;

}
}).show();
return true;
}

return false;
}
}
PS:五子棋，无需图片，直接在程序里画出来的。注意我发的是两个文件，一个activity，一个类文件，别把它当成一个文件了

⑨ 用java设计一个球从屏幕顶上降落到屏幕下面 很急!!!快的我加分

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

public class MainTest {
public static void main(String[] args) {
MainTest thisClass = new MainTest();
}

private static final int SIZEX = 640;
private static final int SIZEY = 480;
private static final int SIZER = 20;
private static final int DELAY = 30;
private static final int STEP = 1;
private static final String START_TXT = "Start";
private static final String STOP_TXT = "Stop";
private static final String PAUSE_TXT = "Pause";
private static final String Resume_TXT = "Resume";

private BufferedImage bm2;
private JButton btn1;
private JButton btn2;
private PaintPanel paintPanel;
private Timer timer;
private double px;
private double py;
private double sx;
private double sy;

private MainTest() {
px = 1 + Math.random() * (SIZEX - 2 * SIZER - 2);
py = 1 + Math.random() * (SIZEY - 2 * SIZER - 2);
bm2 = new BufferedImage(SIZER * 2, SIZER * 2, BufferedImage.TYPE_4BYTE_ABGR);
timer = new Timer(DELAY, new MyActionListener(1));
initBm2(bm2);
JFrame mainFrame = new JFrame();
mainFrame.setLayout(new BorderLayout());
JPanel topPanel = new JPanel(new FlowLayout());
mainFrame.add(topPanel, BorderLayout.NORTH);
btn1 = new JButton(START_TXT);
btn1.addActionListener(new MyActionListener(2));
topPanel.add(btn1);
btn2 = new JButton(PAUSE_TXT);
topPanel.add(btn2);
paintPanel = new PaintPanel();
mainFrame.add(paintPanel, BorderLayout.CENTER);
mainFrame.pack();
mainFrame.setResizable(false);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setVisible(true);
}

private void initBm2(BufferedImage bm2) {
Graphics2D g2 = bm2.createGraphics();
int step = 255 / SIZER;
for (int i = 0; i < SIZER; i++) {
g2.setColor(new Color((255 - i * step) / 2, (i * step) / 2 + 127, 255 - i * step));
g2.fillArc(i, i, (SIZER - i) * 2, (SIZER - i) * 2, 0, 360);
}
}

private class MyActionListener implements ActionListener {
private int type;

private MyActionListener(int type) {
this.type = type;
}

public void actionPerformed(ActionEvent e) {
if (this.type == 1) {
px += sx;
py += sy;
if (px < 1 && sx < 0) {
sx = -sx;
} else if (px > SIZEX - 2 * SIZER - 2 && sx > 0) {
sx = -sx;
}
if (py < 1 && sy < 0) {
sy = -sy;
} else if (py > SIZEY - 2 * SIZER - 2 && sy > 0) {
sy = -sy;
}
paintPanel.repaint();
} else if (this.type == 2) {
if (timer.isRunning()) {
timer.stop();
btn1.setText(START_TXT);
} else {
double de = Math.PI * 2 * Math.random();
sx = Math.cos(de) * STEP;
sy = Math.sin(de) * STEP;
timer.start();
btn1.setText(STOP_TXT);
}
}
}
}

private class PaintPanel extends Component {
private static final long serialVersionUID = 1L;

public Dimension getPreferredSize() {
return new Dimension(SIZEX, SIZEY);
}

public void paint(Graphics g) {
g.setColor(Color.BLACK);
g.fillRect(0, 0, SIZEX, SIZEY);
g.drawImage(bm2, (int) px, (int) py, SIZER * 2, SIZER * 2, null);
g.dispose();
}
}
}

⑩ Python程序开发之简单小程序实例（11）小游戏-跳动的小球

Python程序开发之简单小程序实例

（11）小 游戏 -跳动的小球

一、项目功能

用户控制挡板来阻挡跳动的小球。

二、项目分析

根据项目功能自定义两个类，一个用于控制小球在窗体中的运动，一个用于接收用户按下左右键时，挡板在窗体中的运动。在控制小球的类中，我们还需要考虑当小球下降时，碰到挡板时的位置判断。

三、程序源代码

源码部分截图：

源码：

#!/usr/bin/python3.6

# -*- coding: GBK -*-

#导入相应模块

from tkinter import *

import random

import time

#自定义小球的类 Ball

class Ball:

# 初始化

def __init__(self,canvas,paddle,color):

#传递画布值

self.canvas=canvas

#传递挡板值

self.paddle=paddle

#画圆并且保存其ID

self.id=canvas.create_oval(10,10,25,25,fill=color)

self.canvas.move(self.id,245,100)

#小球的水平位置起始列表

start=[-3,-2,-1,1,2,3]

#随机化位置列表

random.shuffle(start)

self.x=start[0]

self.y=-2

self.canvas_heigh=self.canvas.winfo_height()#获取窗口高度并保存

self.canvas_width=self.canvas.winfo_width()

#根据参数值绘制小球

def draw(self):

self.canvas.move(self.id,self.x,self.y)

pos=self.canvas.coords(self.id)#返回相应ID代表的图形的当前坐标（左上角和右上角坐标）

#使得小球不会超出窗口

pad=self.canvas.coords(self.paddle.id)#获取小球挡板的坐标

if pos[1]=self.canvas_heigh or(pos[3]>=pad[1] and pos[2]>=pad[0] and pos[2]