package com.litao;
import java.awt.Color;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Toolkit;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.util.Random;import java.util.Timer;import javax.swing.JFrame;import javax.swing.JPanel;public class WormStage extends JPanel{public static final int CELL_SIZE = 10;public static final int CELL_COLS = 35;public static final int CELL_ROWS = 35;public static final int CELL_LEN = 12;public static final Color FOOD = new Color(255, 192, 0);public static final Color WORM = new Color(0, 176, 240);public static final Color BACKGROUND = new Color(35, 31, 32);private Random random = new Random();private Timer timer = new Timer();private Worm worm;private Cell cell;public WormStage(){setSize(CELL_COLS * CELL_SIZE, CELL_ROWS * CELL_SIZE);}public void action(){worm = new Worm();cell = randomFood();timer.schedule(new CreepTask(this), 0, 1000);requestFocus();addKeyListener(new KeyAdapter(){@Overridepublic void keyPressed(KeyEvent e){switch (e.getKeyCode()){case KeyEvent.VK_DOWN:worm.changeDirection(Worm.DOWM);createFood();break;case KeyEvent.VK_UP:worm.changeDirection(Worm.UP);createFood();break;case KeyEvent.VK_LEFT:worm.changeDirection(Worm.LEFT);createFood();break;case KeyEvent.VK_RIGHT:worm.changeDirection(Worm.RIGHT);createFood();break;}}});}public void createFood(){if (worm.hit()){worm = new Worm();cell = randomFood();}else{boolean eat = worm.creep(cell);if (eat){cell = randomFood();}}repaint();}private Cell randomFood(){int x;int y;do{x = random.nextInt(CELL_COLS);y = random.nextInt(CELL_ROWS);} while (worm.contains(x, y));return new Cell(x, y);}@Overridepublic void paint(Graphics g){g.setColor(BACKGROUND);g.fillRect(0, 0, getWidth(), getHeight());if (worm != null){worm.paint(g, WORM, BACKGROUND);}if (cell != null){cell.paint(g, FOOD, BACKGROUND);}}public static void main(String[] args){JFrame frame = new JFrame();frame.setSize(460, 470);frame.setTitle("贪吃蛇<李涛版>");Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();frame.setLocation((dimension.width - frame.getWidth()) / 2,(dimension.height - frame.getHeight()) / 2);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setResizable(false);frame.setLayout(null);WormStage wormStage = new WormStage();frame.setVisible(true);int w = frame.getContentPane().getWidth();int h = frame.getContentPane().getHeight();wormStage.setLocation((w - wormStage.getWidth()) / 2, (h - wormStage.getHeight()) / 2);frame.getContentPane().add(wormStage);wormStage.action();}}package com.litao;import java.awt.Color;import java.awt.Graphics;import java.util.Arrays;public class Worm{public static final int UP = 1;public static final int DOWM = -1;public static final int LEFT = 2;public static final int RIGHT = -2;Cell[] cells;int currentDirection = DOWM;public Worm(){cells = new Cell[WormStage.CELL_LEN];for (int i = 0; i < cells.length; i++){cells[i] = new Cell(i, 0);}}public boolean hit(){return hit(currentDirection);}public boolean hit(int direction){Cell nextHead = newHead(direction);if (nextHead.getX() < 0 || nextHead.getY() < 0|| nextHead.getX() >= WormStage.CELL_COLS|| nextHead.getY() >= WormStage.CELL_ROWS){return true;}if (this.contains(nextHead.getX(), nextHead.getY())){return true;}return false;}public boolean creep(Cell food){return creep(currentDirection,food);}public boolean creep(int direction, Cell food){boolean eat = false;if (direction + currentDirection != 0){currentDirection = direction;Cell newHead = newHead(direction);if (newHead.getX() == food.getX() && newHead.getY() == food.getY()){cells = Arrays.copyOf(cells, cells.length + 1);eat = true;}if (newHead != null){for (int i = cells.length - 1; i >= 1; i--){cells[i] = cells[i - 1];}cells[0] = newHead;}}return eat;}public boolean changeDirection(int direction){if (direction + currentDirection != 0){currentDirection = direction;return true;}return false;}public boolean contains(int x, int y){for (int i = 0; i < cells.length; i++){if (x == cells[i].getX() && y == cells[i].getY()){return true;}}return false;}public void paint(Graphics g, Color a, Color b){for (int i = 0; i < cells.length; i++){cells[i].paint(g, a, b);}}public Cell newHead(int direction){Cell newHead = null;Cell head = cells[0];switch (direction){case UP:newHead = new Cell(head.getX(), head.getY() - 1);break;case DOWM:newHead = new Cell(head.getX(), head.getY() + 1);break;case LEFT:newHead = new Cell(head.getX() - 1, head.getY());break;case RIGHT:newHead = new Cell(head.getX() + 1, head.getY());break;}return newHead;}}
package com.litao;import java.awt.Color;import java.awt.Graphics;public class Cell{private int x;private int y;public Cell(){}public Cell(int x, int y){this.x = x;this.y = y;}public Cell(Cell cell){this(cell.x, cell.y);}public int getX(){return x;}public void setX(int x){this.x = x;}public int getY(){return y;}public void setY(int y){this.y = y;}public void paint(Graphics g, Color a, Color b){g.setColor(a);g.fillRect(x * WormStage.CELL_SIZE, y * WormStage.CELL_SIZE,WormStage.CELL_SIZE, WormStage.CELL_SIZE);g.setColor(b);g.drawRect(x * WormStage.CELL_SIZE, y * WormStage.CELL_SIZE,WormStage.CELL_SIZE, WormStage.CELL_SIZE);}}
package com.litao;import java.util.TimerTask;public class CreepTask extends TimerTask{private WormStage wormStage;public CreepTask(WormStage wormStage){this.wormStage = wormStage;}@Overridepublic void run(){wormStage.createFood();}}
