mport java.awt.*;import java.awt.event.*;import javax.swing.*;import java.util.*; public class GreedSnake implements KeyListener{ JFrame mainFrame; Canvas paintCanvas; JLabel labelScore; SnakeModel snakeModel = null; 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 GreedSnake() { mainFrame = new JFrame("GreedSnake"); Container cp = mainFrame.getContentPane(); labelScore = new JLabel("Score:"); cp.add(labelScore, BorderLayout.NORTH); paintCanvas = new Canvas(); paintCanvas.setSize(canvasWidth+1,canvasHeight+1); paintCanvas.addKeyListener(this); cp.add(paintCanvas, BorderLayout.CENTER); 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(this); mainFrame.pack(); mainFrame.setResizable(false); mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); mainFrame.setVisible(true); begin(); } public void keyPressed(KeyEvent e){ int keyCode = e.getKeyCode(); if (snakeModel.running) switch(keyCode){ case KeyEvent.VK_UP: snakeModel.changeDirection(SnakeModel.UP); break; case KeyEvent.VK_DOWN: snakeModel.changeDirection(SnakeModel.DOWN); break; case KeyEvent.VK_LEFT: snakeModel.changeDirection(SnakeModel.LEFT); break; case KeyEvent.VK_RIGHT: snakeModel.changeDirection(SnakeModel.RIGHT); break; case KeyEvent.VK_ADD: case KeyEvent.VK_PAGE_UP: snakeModel.speedUp(); break; case KeyEvent.VK_SUBTRACT: case KeyEvent.VK_PAGE_DOWN: snakeModel.speedDown(); break; case KeyEvent.VK_SPACE: case KeyEvent.VK_P: snakeModel.changePauseState(); break; default: } if (keyCode == KeyEvent.VK_R || keyCode == KeyEvent.VK_S || keyCode == KeyEvent.VK_ENTER){ snakeModel.running = false; begin(); } } public void keyReleased(KeyEvent e){ } public void keyTyped(KeyEvent e){ } 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 = snakeModel.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 = snakeModel.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: " + snakeModel.score; labelScore.setText(s); } void begin(){ if (snakeModel == null || !snakeModel.running){ snakeModel = new SnakeModel(this, canvasWidth/nodeWidth, canvasHeight/nodeHeight); (new Thread(snakeModel)).start(); } } public static void main(String[] args){ GreedSnake gs = new GreedSnake(); }} ///////////////////////////////////////////////////// 文件2/////////////////////////////////////////////////// class SnakeModel implements Runnable{ GreedSnake gs; boolean[][] matrix; LinkedList nodeArray = new LinkedList(); Node food; int maxX; int maxY; int direction = 2; boolean running = false; int timeInterval = 200; double speedChangeRate = 0.75; boolean paused = false; int score = 0; int countMove = 0; // 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(GreedSnake gs, int maxX, int maxY){ this.gs = gs; this.maxX = maxX; this.maxY = maxY; // initial matirx matrix = new boolean[maxX][]; for(int i=0; i<maxX; ++i){ matrix[i] = new boolean[maxY]; Arrays.fill(matrix[i],false); } // initial the snake int initArrayLength = maxX > 20 ? 10 : maxX/2; for(int i = 0; i < initArrayLength; ++i){ int x = maxX/2+i; int y = maxY/2; nodeArray.addLast(new Node(x, y)); matrix[x][y] = true; } food = createFood(); matrix[food.x][food.y] = true; } public void changeDirection(int newDirection){ if (direction % 2 != newDirection % 2){ direction = newDirection; } } public boolean moveOn(){ Node n = (Node)nodeArray.getFirst(); int x = n.x; int y = n.y; switch(direction){ case UP: y--; break; case DOWN: y++; break; case LEFT: x--; break; case RIGHT: x++; break; } if ((0 <= x && x < maxX) && (0 <= y && y < maxY)){ if (matrix[x][y]){ if(x == food.x && y == food.y){ nodeArray.addFirst(food); int scoreGet = (10000 - 200 * countMove) / timeInterval; score += scoreGet > 0? scoreGet : 10; countMove = 0; food = createFood(); matrix[food.x][food.y] = true; return true; } else return false; } else{ 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; } public void run(){ running = true; while (running){ try{ Thread.sleep(timeInterval); } catch(Exception e){ break; } if(!paused){ if (moveOn()){ gs.repaint(); } else{ JOptionPane.showMessageDialog( null, "you failed", "Game Over", JOptionPane.INFORMATION_MESSAGE); break; } } } running = false; } private Node createFood(){ int x = 0; int y = 0; 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; }} -------------- 继续努力,你会成为高手
mport java.awt.*;import java.awt.event.*;import javax.swing.*;import java.util.*; public class GreedSnake implements KeyListener{ JFrame mainFrame; Canvas paintCanvas; JLabel labelScore; SnakeModel snakeModel = null; 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 GreedSnake() { mainFrame = new JFrame("GreedSnake"); Container cp = mainFrame.getContentPane(); labelScore = new JLabel("Score:"); cp.add(labelScore, BorderLayout.NORTH); paintCanvas = new Canvas(); paintCanvas.setSize(canvasWidth+1,canvasHeight+1); paintCanvas.addKeyListener(this); cp.add(paintCanvas, BorderLayout.CENTER); 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(this); mainFrame.pack(); mainFrame.setResizable(false); mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); mainFrame.setVisible(true); begin(); } public void keyPressed(KeyEvent e){ int keyCode = e.getKeyCode(); if (snakeModel.running) switch(keyCode){ case KeyEvent.VK_UP: snakeModel.changeDirection(SnakeModel.UP); break; case KeyEvent.VK_DOWN: snakeModel.changeDirection(SnakeModel.DOWN); break; case KeyEvent.VK_LEFT: snakeModel.changeDirection(SnakeModel.LEFT); break; case KeyEvent.VK_RIGHT: snakeModel.changeDirection(SnakeModel.RIGHT); break; case KeyEvent.VK_ADD: case KeyEvent.VK_PAGE_UP: snakeModel.speedUp(); break; case KeyEvent.VK_SUBTRACT: case KeyEvent.VK_PAGE_DOWN: snakeModel.speedDown(); break; case KeyEvent.VK_SPACE: case KeyEvent.VK_P: snakeModel.changePauseState(); break; default: } if (keyCode == KeyEvent.VK_R || keyCode == KeyEvent.VK_S || keyCode == KeyEvent.VK_ENTER){ snakeModel.running = false; begin(); } } public void keyReleased(KeyEvent e){ } public void keyTyped(KeyEvent e){ } 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 = snakeModel.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 = snakeModel.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: " + snakeModel.score; labelScore.setText(s); } void begin(){ if (snakeModel == null || !snakeModel.running){ snakeModel = new SnakeModel(this, canvasWidth/nodeWidth, canvasHeight/nodeHeight); (new Thread(snakeModel)).start(); } } public static void main(String[] args){ GreedSnake gs = new GreedSnake(); }} ///////////////////////////////////////////////////// 文件2/////////////////////////////////////////////////// class SnakeModel implements Runnable{ GreedSnake gs; boolean[][] matrix; LinkedList nodeArray = new LinkedList(); Node food; int maxX; int maxY; int direction = 2; boolean running = false; int timeInterval = 200; double speedChangeRate = 0.75; boolean paused = false; int score = 0; int countMove = 0; // 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(GreedSnake gs, int maxX, int maxY){ this.gs = gs; this.maxX = maxX; this.maxY = maxY; // initial matirx matrix = new boolean[maxX][]; for(int i=0; i<maxX; ++i){ matrix[i] = new boolean[maxY]; Arrays.fill(matrix[i],false); } // initial the snake int initArrayLength = maxX > 20 ? 10 : maxX/2; for(int i = 0; i < initArrayLength; ++i){ int x = maxX/2+i; int y = maxY/2; nodeArray.addLast(new Node(x, y)); matrix[x][y] = true; } food = createFood(); matrix[food.x][food.y] = true; } public void changeDirection(int newDirection){ if (direction % 2 != newDirection % 2){ direction = newDirection; } } public boolean moveOn(){ Node n = (Node)nodeArray.getFirst(); int x = n.x; int y = n.y; switch(direction){ case UP: y--; break; case DOWN: y++; break; case LEFT: x--; break; case RIGHT: x++; break; } if ((0 <= x && x < maxX) && (0 <= y && y < maxY)){ if (matrix[x][y]){ if(x == food.x && y == food.y){ nodeArray.addFirst(food); int scoreGet = (10000 - 200 * countMove) / timeInterval; score += scoreGet > 0? scoreGet : 10; countMove = 0; food = createFood(); matrix[food.x][food.y] = true; return true; } else return false; } else{ 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; } public void run(){ running = true; while (running){ try{ Thread.sleep(timeInterval); } catch(Exception e){ break; } if(!paused){ if (moveOn()){ gs.repaint(); } else{ JOptionPane.showMessageDialog( null, "you failed", "Game Over", JOptionPane.INFORMATION_MESSAGE); break; } } } running = false; } private Node createFood(){ int x = 0; int y = 0; 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; }}
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继续努力,你会成为高手
snake类应该有个属性:方向,就是snake当前的运动方向,通过上下左右可以改变它。
如果要实现snake自动运动,要用到线程或者是Timer(swing包中)。我用的是Timer,它可以实现每隔一段时间触发ActionEvent,这样只要自己实现ActionListener ActionListener taskPerform=new ActionListener(){
public void actionPerformed(ActionEvent e){
//让snake按照当前运动方向前进一格
//让绘制snake的组件重绘
}
};
Timer timer=new Timer(100,taskPerform);
还有"用一个集合类装构成蛇身体的方块当按下方向键时向那个方向添加一个方块同时remove蛇尾的方块",我觉得可以用队列来实现,每次只要把新生成的方块(蛇头)入队,出队的那个方块就是蛇尾。因为蛇尾是在队列中时间最长的那个。
这就是我的一些想法,楼主看有没有用
网上也应该有这种代码吧