{"id":179,"date":"2005-06-22T08:00:00","date_gmt":"2005-06-22T08:00:00","guid":{"rendered":"https:\/\/out.cat\/?p=175"},"modified":"2005-06-22T08:00:00","modified_gmt":"2005-06-22T08:00:00","slug":"175","status":"publish","type":"post","link":"https:\/\/out.cat\/?p=179","title":{"rendered":"\u8d2a\u98df\u86c7"},"content":{"rendered":"

import java.awt.*;
\nimport java.awt.event.*;
\nimport javax.swing.*;
\nimport java.util.*;
\nimport javax.swing.*;
\npublic class GreedSnake implements KeyListener{
\n JFrame mainFrame;
\n Canvas paintCanvas;
\n JLabel labelScore;
\n SnakeModel snakeModel = null;
\n public static final int canvasWidth = 200;
\n public static final int canvasHeight = 200;
\n public static final int nodeWidth = 10;
\n public static final int nodeHeight = 10;
\n public GreedSnake() {
\n mainFrame = new JFrame(“GreedSnake”);
\n Container cp = mainFrame.getContentPane();
\n labelScore = new JLabel(“Score:”);
\n cp.add(labelScore, BorderLayout.NORTH);
\n paintCanvas = new Canvas();
\n paintCanvas.setSize(canvasWidth,canvasHeight);
\n paintCanvas.addKeyListener(this);
\n cp.add(paintCanvas, BorderLayout.CENTER);
\n JPanel panelButtom = new JPanel();
\n panelButtom.setLayout(new BorderLayout());
\n JLabel labelHelp;
\n labelHelp = new JLabel(“PageUp, PageDown for speed;”, JLabel.CENTER);
\n panelButtom.add(labelHelp, BorderLayout.NORTH);
\n labelHelp = new JLabel(“ENTER or R or S for start;”, JLabel.CENTER);
\n panelButtom.add(labelHelp, BorderLayout.CENTER);
\n labelHelp = new JLabel(“SPACE or P for pause”,JLabel.CENTER);
\n panelButtom.add(labelHelp, BorderLayout.SOUTH);
\n cp.add(panelButtom,BorderLayout.SOUTH);
\n mainFrame.addKeyListener(this);
\n mainFrame.pack();
\n mainFrame.setResizable(false);
\n mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
\n mainFrame.setVisible(true);
\n begin();
\n }
\n public void keyPressed(KeyEvent e){
\n int keyCode = e.getKeyCode();
\n if (snakeModel.running)
\n switch(keyCode){
\n case KeyEvent.VK_UP:
\n snakeModel.changeDirection(SnakeModel.UP);
\n break;
\n case KeyEvent.VK_DOWN:
\n snakeModel.changeDirection(SnakeModel.DOWN);
\n break;
\n case KeyEvent.VK_LEFT:
\n snakeModel.changeDirection(SnakeModel.LEFT);
\n break;
\n case KeyEvent.VK_RIGHT:
\n snakeModel.changeDirection(SnakeModel.RIGHT);
\n break;
\n case KeyEvent.VK_ADD:
\n case KeyEvent.VK_PAGE_UP:
\n snakeModel.speedUp();
\n break;
\n case KeyEvent.VK_SUBTRACT:
\n case KeyEvent.VK_PAGE_DOWN:
\n snakeModel.speedDown();
\n break;
\n case KeyEvent.VK_SPACE:
\n case KeyEvent.VK_P:
\n snakeModel.changePauseState();
\n break;
\n default:
\n }
\n if (keyCode == KeyEvent.VK_R ||
\n keyCode == KeyEvent.VK_S ||
\n keyCode == KeyEvent.VK_ENTER){
\n snakeModel.running = false;
\n begin();
\n }
\n }
\n public void keyReleased(KeyEvent e){
\n }
\n public void keyTyped(KeyEvent e){
\n }
\n void repaint(){
\n Graphics g = paintCanvas.getGraphics();
\n \/\/draw background
\n g.setColor(Color.WHITE);
\n g.fillRect(0,0,canvasWidth,canvasHeight);
\n \/\/ draw the snake
\n g.setColor(Color.BLACK);
\n LinkedList na = snakeModel.nodeArray;
\n Iterator it = na.iterator();
\n while(it.hasNext()){
\n Node n = (Node)it.next();
\n drawNode(g,n);
\n }
\n \/\/ draw the food
\n g.setColor(Color.RED);
\n Node n = snakeModel.food;
\n drawNode(g,n);
\n updateScore();
\n }
\n private void drawNode(Graphics g, Node n){
\n g.fillRect(n.x*nodeWidth,
\n n.y*nodeHeight,
\n nodeWidth-1,
\n nodeHeight-1);
\n }
\n public void updateScore(){
\n String s = “Score: ” + snakeModel.score;
\n labelScore.setText(s);
\n }
\n void begin(){
\n if (snakeModel == null || !snakeModel.running){
\n snakeModel = new SnakeModel(this,
\n canvasWidth\/nodeWidth,
\n canvasHeight\/nodeHeight);
\n (new Thread(snakeModel)).start();
\n }
\n }
\n public static void main(String[] args){
\n GreedSnake gs = new GreedSnake();
\n }
\n}
\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
\n\/\/ \u6587\u4ef62
\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
\nclass SnakeModel implements Runnable{
\n GreedSnake gs;
\n boolean[][] matrix;
\n LinkedList nodeArray = new LinkedList();
\n Node food;
\n int maxX;
\n int maxY;
\n int direction = 2;
\n boolean running = false;
\n int timeInterval = 200;
\n double speedChangeRate = 0.75;
\n boolean paused = false;
\n int score = 0;
\n int countMove = 0;
\n \/\/ UP and DOWN should be even
\n \/\/ RIGHT and LEFT should be odd
\n public static final int UP = 2;
\n public static final int DOWN = 4;
\n public static final int LEFT = 1;
\n public static final int RIGHT = 3;
\n public SnakeModel(GreedSnake gs, int maxX, int maxY){
\n this.gs = gs;
\n this.maxX = maxX;
\n this.maxY = maxY;
\n \/\/ initial matirx
\n matrix = new boolean[maxX][];
\n for(int i=0; i 20 ? 10 : maxX\/2;
\n for(int i = 0; i < initArrayLength; ++i){\n int x = maxX\/2+i;\n int y = maxY\/2;\n nodeArray.addLast(new Node(x, y));\n matrix[x][y] = true;\n }\n food = createFood();\n matrix[food.x][food.y] = true;\n }\n public void changeDirection(int newDirection){\n if (direction % 2 != newDirection % 2){\n direction = newDirection;\n }\n }\n public boolean moveOn(){\n Node n = (Node)nodeArray.getFirst();\n int x = n.x;\n int y = n.y;\n switch(direction){\n case UP:\n y--;\n break;\n case DOWN:\n y++;\n break;\n case LEFT:\n x--;\n break;\n case RIGHT:\n x++;\n break;\n }\n if ((0 <= x && x < maxX) && (0 <= y && y < maxY)){\n if (matrix[x][y]){\n if(x == food.x && y == food.y){\n nodeArray.addFirst(food);\n int scoreGet = (10000 - 200 * countMove) \/ timeInterval;\n score += scoreGet > 0? scoreGet : 10;
\n countMove = 0;
\n food = createFood();
\n matrix[food.x][food.y] = true;
\n return true;
\n }
\n else
\n return false;
\n }
\n else{
\n nodeArray.addFirst(new Node(x,y));
\n matrix[x][y] = true;
\n n = (Node)nodeArray.removeLast();
\n matrix[n.x][n.y] = false;
\n countMove++;
\n return true;
\n }
\n }
\n return false;
\n }
\n public void run(){
\n running = true;
\n while (running){
\n try{
\n Thread.sleep(timeInterval);
\n }
\n catch(Exception e){
\n break;
\n }
\n if(!paused){
\n if (moveOn()){
\n gs.repaint();
\n }
\n else{
\n JOptionPane.showMessageDialog(
\n null,
\n “you failed”,
\n “Game Over”,
\n JOptionPane.INFORMATION_MESSAGE);
\n break;
\n }
\n }
\n }
\n running = false;
\n }
\n private Node createFood(){
\n int x = 0;
\n int y = 0;
\n do{
\n Random r = new Random();
\n x = r.nextInt(maxX);
\n y = r.nextInt(maxY);
\n }while(matrix[x][y]);
\n return new Node(x,y);
\n }
\n public void speedUp(){
\n timeInterval *= speedChangeRate;
\n }
\n public void speedDown(){
\n timeInterval \/= speedChangeRate;
\n }
\n public void changePauseState(){
\n paused = !paused;
\n }
\n public String toString(){
\n String result = “”;
\n for(int i=0; i\n","protected":false},"excerpt":{"rendered":"

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