項目實戰(zhàn) - 貪吃蛇

圖片資源提取地址
百度網(wǎng)盤

鏈接：https://pan.baidu.com/s/19gEhIuZrut12l5a8jcknFA?pwd=1111
提取碼：1111

界面繪制

這里設(shè)計到幀的概念，即一秒鐘里有多少張圖片，一般電影為24幀，每一幀就是一張圖片

涉及到鍵盤監(jiān)聽，以及計時器每隔一段時間進行頁面刷新

先繪制靜態(tài)頁面
![[Pasted image 20220604102255.png]]

游戲整體界面

• 里面承載廣告圖片以及游戲界面

游戲啟動類
代碼

public class StartGame { public static void main(String[] args) { JFrame frame = new JFrame("貪吃蛇"); //游戲界面-單獨在面板上面 frame.add(new GamePanel()); frame.setResizable(false);//窗口大小不可變 frame.setBounds(200,200,905,720); frame.setVisible(true); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } }

游戲面板類
代碼

//游戲的面板 public class GamePanel extends JPanel { //繪制面板 @Override protected void paintComponent(Graphics g) { super.paintComponent(g);//清屏 this.setBackground(Color.BLACK); this.setBackground(Color.WHITE); Data.header.paintIcon(this,g,25,11); //畫出黑色游戲界面 g.fillRect(25,75,850,600); } }

數(shù)據(jù)中心

代碼

//數(shù)據(jù)中心 public class Data { //相對路徑 //絕對路徑 /相當(dāng)于當(dāng)前項目 public static URL headerURL = Data.class.getResource("static/header.png"); public static ImageIcon header = new ImageIcon(headerURL); public static URL upURL = Data.class.getResource("static/up.png"); public static URL downURL = Data.class.getResource("static/down.png"); public static URL leftURL = Data.class.getResource("static/left.png"); public static URL rightURL = Data.class.getResource("static/right.png"); public static ImageIcon up = new ImageIcon(upURL); public static ImageIcon down = new ImageIcon(downURL); public static ImageIcon left = new ImageIcon(leftURL); public static ImageIcon right = new ImageIcon(rightURL); public static URL bodyURL = Data.class.getResource("static/body.png"); public static ImageIcon body = new ImageIcon(bodyURL); public static URL foodURL = Data.class.getResource("static/food.png"); public static ImageIcon food = new ImageIcon(foodURL); }

運行時可能會報錯ClassNotFound

首先檢查Data類中的url是否寫對

重啟Idea，再次啟動即可

最后的效果
截圖

繪制靜態(tài)小蛇

游戲啟動類
代碼

public class StartGame { public static void main(String[] args) { JFrame frame = new JFrame("貪吃蛇"); //游戲界面-單獨在面板上面 frame.add(new GamePanel()); frame.setResizable(false);//窗口大小不可變 frame.setBounds(200,200,905,720); frame.setVisible(true); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } }

游戲面板類
代碼

//游戲的面板 public class GamePanel extends JPanel { //定義蛇的數(shù)據(jù)結(jié)構(gòu) int length;//蛇的長度 //黑色游戲界面總共大小為850*600 //所以小蛇最多的節(jié)數(shù)為850*600/25*25 = 816 //所以只需要以下兩個數(shù)組比816長即可 int[] snakeX = new int[850];//蛇的X坐標 int[] snakeY = new int[850];//蛇的Y坐標 String dir;//初始方向 //當(dāng)前游戲狀態(tài)：開始，停止 boolean isStart = false; //默認是不開始 //構(gòu)造器 public GamePanel(){ init(); } //初始化方法 public void init(){ length = 3; snakeX[0] = 100;snakeY[0] = 100;//腦袋的坐標 snakeX[1] = 75;snakeY[1] = 100; //第一節(jié)身體坐標 snakeX[2] = 50;snakeY[2] = 100; //第二節(jié)身體坐標 dir = "R"; //初始方向向右 } //繪制面板 @Override protected void paintComponent(Graphics g) { super.paintComponent(g);//清屏 this.setBackground(Color.WHITE); Data.header.paintIcon(this,g,25,11); //畫出黑色游戲界面 g.fillRect(25,75,850,600); //把小蛇畫上去 //蛇頭初始化向右 switch (dir) { case "R": Data.right.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "L": Data.left.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "U": Data.up.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "D": Data.down.paintIcon(this, g, snakeX[0], snakeY[0]); break; } for (int i = 1; i < length; i++) { Data.body.paintIcon(this,g,snakeX[i],snakeY[i]); } //游戲狀態(tài) if (!isStart) { g.setColor(Color.white); g.setFont(new Font("微軟雅黑",Font.BOLD,40)); g.drawString("按下空格開始游戲",300,300); } } }

讓小蛇動起來

實現(xiàn)按下空格游戲開始游戲暫停
游戲面板類
代碼

//游戲的面板 public class GamePanel extends JPanel implements KeyListener { //定義蛇的數(shù)據(jù)結(jié)構(gòu) int length;//蛇的長度 //黑色游戲界面總共大小為850*600 //所以小蛇最多的節(jié)數(shù)為850*600/25*25 = 816 //所以只需要以下兩個數(shù)組比816長即可 int[] snakeX = new int[850];//蛇的X坐標 int[] snakeY = new int[850];//蛇的Y坐標 String dir;//初始方向 //當(dāng)前游戲狀態(tài)：開始，停止 boolean isStart = false; //默認是不開始 //構(gòu)造器 public GamePanel(){ init(); //獲得焦點事件 this.setFocusable(true); //獲得鍵盤事件 this.addKeyListener(this); } //初始化方法 public void init(){ length = 3; snakeX[0] = 100;snakeY[0] = 100;//腦袋的坐標 snakeX[1] = 75;snakeY[1] = 100; //第一節(jié)身體坐標 snakeX[2] = 50;snakeY[2] = 100; //第二節(jié)身體坐標 dir = "R"; //初始方向向右 } //繪制面板 @Override protected void paintComponent(Graphics g) { super.paintComponent(g);//清屏 this.setBackground(Color.WHITE); Data.header.paintIcon(this,g,25,11); //畫出黑色游戲界面 g.fillRect(25,75,850,600); //把小蛇畫上去 //蛇頭初始化向右 switch (dir) { case "R": Data.right.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "L": Data.left.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "U": Data.up.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "D": Data.down.paintIcon(this, g, snakeX[0], snakeY[0]); break; } for (int i = 1; i < length; i++) { Data.body.paintIcon(this,g,snakeX[i],snakeY[i]); } //游戲狀態(tài) if (!isStart) { g.setColor(Color.white); g.setFont(new Font("微軟雅黑",Font.BOLD,40)); g.drawString("按下空格開始游戲",300,300); } } //鍵盤監(jiān)聽事件 @Override public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode(); if (keyCode == KeyEvent.VK_SPACE) { isStart = !isStart; repaint(); } } @Override public void keyTyped(KeyEvent e) { } @Override public void keyReleased(KeyEvent e) { } }

鍵盤控制小蛇移動

游戲面板類
代碼

//游戲的面板 public class GamePanel extends JPanel implements KeyListener, ActionListener { //定義蛇的數(shù)據(jù)結(jié)構(gòu) int length;//蛇的長度 //黑色游戲界面總共大小為850*600 //所以小蛇最多的節(jié)數(shù)為850*600/25*25 = 816 //所以只需要以下兩個數(shù)組比816長即可 int[] snakeX = new int[850];//蛇的X坐標 int[] snakeY = new int[850];//蛇的Y坐標 String dir;//初始方向 //當(dāng)前游戲狀態(tài)：開始，停止 boolean isStart = false; //默認是不開始 Timer timer = new Timer(100,this);//監(jiān)聽當(dāng)前對象，100ms刷新一次 //構(gòu)造器 public GamePanel(){ init(); //獲得焦點事件 this.setFocusable(true); //獲得鍵盤事件 this.addKeyListener(this); } //初始化方法 public void init(){ length = 3; snakeX[0] = 100;snakeY[0] = 100;//腦袋的坐標 snakeX[1] = 75;snakeY[1] = 100; //第一節(jié)身體坐標 snakeX[2] = 50;snakeY[2] = 100; //第二節(jié)身體坐標 dir = "R"; //初始方向向右 timer.start(); } //繪制面板 @Override protected void paintComponent(Graphics g) { super.paintComponent(g);//清屏 this.setBackground(Color.WHITE); Data.header.paintIcon(this,g,25,11); //畫出黑色游戲界面 g.fillRect(25,75,850,600); //把小蛇畫上去 //蛇頭圖片 switch (dir) { case "R": Data.right.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "L": Data.left.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "U": Data.up.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "D": Data.down.paintIcon(this, g, snakeX[0], snakeY[0]); break; } for (int i = 1; i < length; i++) { Data.body.paintIcon(this,g,snakeX[i],snakeY[i]); } //游戲狀態(tài) if (!isStart) { g.setColor(Color.white); g.setFont(new Font("微軟雅黑",Font.BOLD,40)); g.drawString("按下空格開始游戲",300,300); } } //鍵盤監(jiān)聽事件 @Override public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode(); if (keyCode == KeyEvent.VK_SPACE) { isStart = !isStart; repaint(); } //小蛇移動 switch (keyCode) { case KeyEvent.VK_UP: dir = "U"; break; case KeyEvent.VK_DOWN: dir = "D"; break; case KeyEvent.VK_LEFT: dir = "L"; break; case KeyEvent.VK_RIGHT: dir = "R"; break; } } @Override public void keyTyped(KeyEvent e) { } @Override public void keyReleased(KeyEvent e) { } //實現(xiàn)事件監(jiān)聽 //實現(xiàn)隔一段時間按刷新，比如說一秒10次 @Override public void actionPerformed(ActionEvent e) { //如果游戲是開始狀態(tài)，小蛇就動起來 if (isStart) { //右移 for (int i = length - 1; i > 0; i--) { snakeX[i] = snakeX[i-1]; snakeY[i] = snakeY[i-1]; } //腦袋如何移動 switch (dir) { case "U": snakeY[0] = snakeY[0] - 25; break; case "D": snakeY[0] = snakeY[0] + 25; break; case "L": snakeX[0] = snakeX[0] - 25; break; case "R": snakeX[0] = snakeX[0] + 25; break; } //邊界判斷 if(snakeX[0] > 850) snakeX[0] = 25; if(snakeX[0] < 25) snakeX[0] = 850; if(snakeY[0] > 650) snakeY[0] = 75; if(snakeY[0] < 75) snakeY[0] = 650; repaint();//重畫頁面 } timer.start(); } }

小蛇吃食物長大、失敗判定及積分系統(tǒng)

游戲面板類
代碼

//游戲的面板 public class GamePanel extends JPanel implements KeyListener, ActionListener { //定義蛇的數(shù)據(jù)結(jié)構(gòu) int length;//蛇的長度 //黑色游戲界面總共大小為850*600 //所以小蛇最多的節(jié)數(shù)為850*600/25*25 = 816 //所以只需要以下兩個數(shù)組比816長即可 int[] snakeX = new int[850];//蛇的X坐標 int[] snakeY = new int[850];//蛇的Y坐標 String dir;//初始方向 //食物坐標 int foodX; int foodY; Random random = new Random(); int score; //當(dāng)前游戲狀態(tài)：開始，停止 boolean isStart = false; //默認是不開始 boolean isFail = false; //游戲是否失敗，初始化為未失敗 Timer timer = new Timer(100,this);//監(jiān)聽當(dāng)前對象，100ms刷新一次 //構(gòu)造器 public GamePanel(){ init(); //獲得焦點事件 this.setFocusable(true); //獲得鍵盤事件 this.addKeyListener(this); timer.start(); } //初始化方法 public void init(){ length = 3; snakeX[0] = 100;snakeY[0] = 100;//腦袋的坐標 snakeX[1] = 75;snakeY[1] = 100; //第一節(jié)身體坐標 snakeX[2] = 50;snakeY[2] = 100; //第二節(jié)身體坐標 dir = "R"; //初始方向向右 foodX = 25 + 25*random.nextInt(33); foodY = 75 + 25*random.nextInt(23); score = 0; } //繪制面板 @Override protected void paintComponent(Graphics g) { super.paintComponent(g);//清屏 this.setBackground(Color.WHITE); Data.header.paintIcon(this,g,25,11); //畫出黑色游戲界面 g.fillRect(25,75,850,600); //畫積分 g.setColor(Color.white); g.setFont(new Font("微軟雅黑",Font.BOLD,18)); g.drawString("長度"+length,750,35); g.drawString("分數(shù)"+score,750,50); Data.food.paintIcon(this,g,foodX,foodY); //把小蛇畫上去 //蛇頭圖片 switch (dir) { case "R": Data.right.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "L": Data.left.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "U": Data.up.paintIcon(this, g, snakeX[0], snakeY[0]); break; case "D": Data.down.paintIcon(this, g, snakeX[0], snakeY[0]); break; } for (int i = 1; i < length; i++) { Data.body.paintIcon(this,g,snakeX[i],snakeY[i]); } //游戲狀態(tài) if (!isStart) { g.setColor(Color.white); g.setFont(new Font("微軟雅黑",Font.BOLD,40)); g.drawString("按下空格開始游戲",300,300); } if (isFail) { g.setColor(Color.red); g.setFont(new Font("微軟雅黑",Font.BOLD,40)); g.drawString("失敗，按下空格重新開始游戲",200,300); } } //鍵盤監(jiān)聽事件 @Override public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode(); if (keyCode == KeyEvent.VK_SPACE) { if (isFail) { //重新開始 isFail = false; init(); } else{ isStart = !isStart; } repaint(); } //小蛇移動 switch (keyCode) { case KeyEvent.VK_UP: dir = "U"; break; case KeyEvent.VK_DOWN: dir = "D"; break; case KeyEvent.VK_LEFT: dir = "L"; break; case KeyEvent.VK_RIGHT: dir = "R"; break; } } @Override public void keyTyped(KeyEvent e) { } @Override public void keyReleased(KeyEvent e) { } //實現(xiàn)事件監(jiān)聽 //實現(xiàn)隔一段時間按刷新，比如說一秒10次 @Override public void actionPerformed(ActionEvent e) { //如果游戲是開始狀態(tài)，小蛇就動起來 if (isStart && !isFail) { //吃食物 if(snakeX[0] == foodX && snakeY[0] == foodY) { //長度+1 length++; //分數(shù)+10 score+=10; //再次隨機事物 foodX = 25 + 25*random.nextInt(33); foodY = 75 + 25*random.nextInt(23); } //右移 for (int i = length - 1; i > 0; i--) { snakeX[i] = snakeX[i-1]; snakeY[i] = snakeY[i-1]; } //腦袋如何移動 switch (dir) { case "U": snakeY[0] = snakeY[0] - 25; break; case "D": snakeY[0] = snakeY[0] + 25; break; case "L": snakeX[0] = snakeX[0] - 25; break; case "R": snakeX[0] = snakeX[0] + 25; break; } //邊界判斷 if(snakeX[0] > 850) snakeX[0] = 25; if(snakeX[0] < 25) snakeX[0] = 850; if(snakeY[0] > 650) snakeY[0] = 75; if(snakeY[0] < 75) snakeY[0] = 650; //失敗判定，撞到自己就失敗 for (int i = 1; i < length; i++) { if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]) isFail = true; } repaint();//重畫頁面 } timer.start(); } }

此時，游戲啟動后便可以正常運行，基礎(chǔ)功能已經(jīng)實現(xiàn)

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