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DOJA开辟贪吃蛇的代码[Java编程]

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公司预备做手机游戏方面的项目,第一次做DOJA相关的项目,操练了“贪吃蛇”这个游戏,现把自己做的源代码公布出来,但愿给才接触DOJA的新手一点提醒和帮忙.也欢送大家提出改正.

//主运行类

package greedSnake;
import com.nttdocomo.ui.Display;
import com.nttdocomo.ui.IApplication;
public class GreedSnake extends IApplication implements Runnable{
public static final int GRID_WIDTH = 20;
public static final int GRID_HEIGHT = 24;
public static final int NODE_SIZE  = 10;
private Grid      grid = null;
private Food   food = null;
private Snake      snake = new Snake();;
private boolean     running;
private int    score;
private int       level;
private int       count;
private int    countMove;
private int    timeInterval;

  //----------------------------------------
  /** Set up game. */
  public void start() {
  reset();
grid = new Grid(GRID_WIDTH, GRID_HEIGHT, this);
Display.setCurrent(grid);
Thread runner = new Thread(this);
runner.start();

  }
private void reset() {
 running = false;
 score = 0;
 level = 0;
 count = 0;
 countMove = 6;
 timeInterval = 200;
}

  /** Runnable interface. */
  public void run() {
 food=grid.addFood();
 grid.addSnake(snake);
 grid.repaint();
 for(;;) {
if (food == null) {
   food=grid.addFood();
   continue;
}
try {
  Thread.sleep(timeInterval);
} catch (Exception e) {
  break;
}

if (!running) {
  snake.move();
  Node head = snake.getHead();
  if (grid.overlapsWith(head)||(snake.ptInSnake(head))){
running = true;
continue;
  }
  if((head.x==food.getX())&&(head.y==food.getY())){
int scoreGet=(10000-200*countMove)/timeInterval;
score+=scoreGet>0 ? scoreGet : 0;
countMove=0;
snake.eatFood(food);
grid.reduceFood(food);
food=null;

if( ++count%5 == 0){
   level++;
}

  }else{
countMove++;
  }

grid.repaint();

}else{
  grid.setGameOver();
  break;
}
 }

grid.repaint();

  }

public int getScore() {
 return score;
}

/** Get the current level of the game. */
  public int getLevel() {
  return level;
  }
/** Key event handler. */
  public void keyPressed(int key) {

 if (key == Display.KEY_SELECT) {
grid.setGameOver();
 }
if (key == Display.KEY_LEFT) {
snake.setDirection(Snake.LEFT);
  }
if (key == Display.KEY_RIGHT) {
snake.setDirection(Snake.RIGHT);
  }
if (key == Display.KEY_DOWN) {
snake.setDirection(Snake.DOWN);
  }
  if (key == Display.KEY_UP) {
snake.setDirection(Snake.UP);
  }
}
}
//画面框架类
package greedSnake;
import com.nttdocomo.ui.Canvas;
import com.nttdocomo.ui.Display;
import com.nttdocomo.ui.Font;
import com.nttdocomo.ui.Frame;
import com.nttdocomo.ui.Graphics;
//---------------------
/**
* This class represents the grid box that catches
* the pieces dropping from above. If a dropped piece
* fills up one or more horizontal lines in the grid,
* these lines will be removed from it.
*/
public class Grid extends Canvas {
private int    width;
private int    height;
private GreedSnake  listener;
private Snake      snake;
private Food  food;
private String   pad = "0000";
private Font    score_font;
private Font    game_over_font;
private boolean  blDisplay;
private boolean  game_over;
static final int  SOFT_LEFT = Frame.SOFT_KEY_1;
static final int  SOFT_RIGHT = Frame.SOFT_KEY_2;

/**
 * Create a new instance of this class.
 * @param witdth the width (in tiles) of this grid
 * @param height the height (in tiles) of this grid
 * @param score the score object to keep track of the score
 * @param listener a reference to the owning tetris object
 */
public Grid(int width, int height, GreedSnake listener) {
this.width  = width;
 this.height  = height;
 this.listener = listener;
 reset();
 setSoftLabel(SOFT_LEFT, "New");
 setSoftLabel(SOFT_RIGHT, "Quit");
 score_font  = Font.getFont(Font.FACE_MONOSPACE | Font.SIZE_SMALL);
 game_over_font = Font.getFont(Font.FACE_PROPORTIONAL | Font.SIZE_LARGE | Font.STYLE_BOLD);
}
/** Remove all pieces from this instance */
private void reset() {

 synchronized (this) {
food = null;
snake= null;
 }
 game_over = false;
 blDisplay = false;
}

public void setGameOver() {
 snake = null;
 food = null;
 game_over = true;
}
/** Get the width (in tiles) of this instance. */
public int getGridWidth() {
 return width;
}
/** Get the height (in tiles) of this instance. */
public int getGridHeight() {
 return height;
}

/** Add the specified piece to this instance. */
public Food addFood() {
 blDisplay= false;
 int gs = GreedSnake.GRID_WIDTH;
 if(snake == null){
this.food =Food.createRandomFood(gs,gs);
 }else{
for(;;){
  this.food =Food.createRandomFood(gs,gs);
  Node newNode = new Node(food.getX(),food.getY());
  if(snake.ptInSnake(newNode)){
this.food = null;
continue;
  }else{
break;
  }
}
 }
 return this.food;
}

public void addSnake(Snake snake) {

 this.snake=snake;
 Node head=(Node)snake.getHead();
}
/**
 * Returns <code>true</code> if the specified
 * piece overlaps with any tile in this instance,
 * <code>false</code> otherwise.
 */
public boolean overlapsWith(Node node) {
 if ((node.x<0) || (node.x>getGridWidth()-1)
  || (node.y<0) || (node.y>getGridHeight()-1)) {

return true;
 }
 return false;
}

public void reduceFood(Food food) {
 blDisplay = true;
}

private String format(int n) {
String raw = "" + n;
return pad.substring(0, 4 - raw.length()) + raw;
}
/** Paint this instance onto the specified graphics context. */
public synchronized void paint(Graphics g) {
 g.lock();
 g.setColor(Graphics.getColorOfName(Graphics.BLACK));
 g.fillRect(0, 0, getWidth(), getHeight());
 g.setColor(Graphics.getColorOfName(Graphics.WHITE));
 g.drawLine(0, 0, 0, getHeight());
 g.drawLine(201, 0, 201, getHeight());
 g.drawLine(0, getHeight(), 201, getHeight());
if ((food != null)&& (!blDisplay)) {
food.paint(g);
 }

 if (snake != null) {
snake.paint(g);
 }

 g.setColor(Graphics.getColorOfName(Graphics.SILVER));
 g.setFont(score_font);
 g.drawString("LEVEL", 203, 40);
 g.drawString(String.valueOf(listener.getLevel()), 220, 70);
 g.drawString("SCORE", 202, 100);
 g.drawString(format(listener.getScore()), 208, 130);

 if (game_over) {
g.setColor(0x00ffff);
g.setFont(game_over_font);
g.drawString("GAME", 70, 110);
g.drawString("OVER", 70, 140);
 }
 g.unlock(true);
}
/** Process key events. */
public void processEvent(int type, int param) {
if (type == Display.KEY_PRESSED_EVENT) {
listener.keyPressed(param);
 }
}
}
//蛇对象类
package greedSnake;
import java.util.Random;
import java.util.Vector;
import java.util.Enumeration;
import com.nttdocomo.ui.Graphics;
public class Snake {
public final static int UP = 1;
public final static int DOWN  = 3;
public final static int LEFT  = 2;
public final static int RIGHT = 4;
private int direction;
//  private Grid          grid;
private Node node;
private Vector snakeData = null;
private static Random rnd= new Random();
/** Private internal constructor. */
public Snake() {
 snakeData = new Vector();
 Node node = new Node(4,0);
 snakeData.addElement(node);
 node = new Node(3,0);
 snakeData.addElement(node);
 node = new Node(2,0);
 snakeData.addElement(node);
 node = new Node(1,0);
 snakeData.addElement(node);
 node = new Node(0,0);
 snakeData.addElement(node);
 setDirection(Snake.DOWN);
}

public int getDirection() {
 return direction;
}

public void setDirection(int dir) {
 if(direction%2!=dir%2){
direction = dir;
 }
}
public Node getHead() {
 return (Node) snakeData.elementAt(0);
}

public Node getNextHead() {
 Node node = (Node) snakeData.elementAt(0);
 node = new Node(node.x,node.y);
 switch(this.direction) {
case Snake.UP:
  node.y--;
  break;
case Snake.DOWN:
   node.y++;
   break;
   case Snake.LEFT:
   node.x--;
   break;
   case Snake.RIGHT:
   node.x++;
   break;
  }
  return node;
  }

  public void move() {
 Node node= (Node)snakeData.elementAt(0);
 Node newNode = this.getNextHead();
  for (int i =snakeData.size()-1 ; i>0; i--) {
Node node1 = (Node) snakeData.elementAt(i);
Node node2 = (Node) snakeData.elementAt(i-1);
   node1.x = node2.x;
   node1.y = node2.y;
  }
  node.x = newNode.x;
  node.y = newNode.y;

  }

public void addNode() {
 Node node = (Node) snakeData.lastElement();
 Node newNode = new Node(node.x,node.y);
 snakeData.addElement(newNode);
}

  public void paint(Graphics g) {
  int SnakeColor= 0xff0000;
  int gn = GreedSnake.NODE_SIZE;
 Enumeration e = snakeData.elements() ;
 while(e.hasMoreElements()){
Node node = (Node)e.nextElement() ;
g.setColor(SnakeColor);
g.fillRect(node.x * gn, node.y * gn, gn, gn);
  }
  }
public void eatFood(Food food) {

 this.addNode();

}
public boolean ptInSnake(Node node) {
 for (int i = 1; i<snakeData.size(); i++) {
Node nodeInSnake = (Node) snakeData.elementAt(i);
if ((nodeInSnake.x == node.x)&&(nodeInSnake.y == node.y)) {
  return true;
}
 }
 return false;
}
}
//食物对象类
package greedSnake;
import java.util.Random;
import com.nttdocomo.ui.Graphics;
public class Food {
private int x;
private int y;
private static Random rnd = new Random();

private Food(int x,int y) {
  this.x   = x;
  this.y   = y;
}

public static Food createRandomFood(int width,int height) {
   return createFood( getRandomInt(width),getRandomInt(height));
}

private static int getRandomInt(int limit) {
   return Math.abs(rnd.nextInt() % limit);
}

private static Food createFood(int x,int y) {
 return new Food(x,y);
}
/**
 * Get the x coordinate of the base
 * location of this instance.
 */
public int getX() {
 return x;
}
/**
 * Get the y coordinate of the base
 * location of this instance.
 */
public int getY() {
 return y;
}
/** Paint this instance onto the specified Graphics context. */
public synchronized void paint(Graphics g) {
 int gn = GreedSnake.NODE_SIZE;
 int FoodColor= 0x0000ff;
 g.setColor(FoodColor);
 g.fillRect(this.getX()* gn,this.getY()* gn,gn,gn);
}
}

//节点对象类
/package greedSnake;
public class Node {
public int x;
public int y;
/** Create a new instance of this class. */
public Node(int x, int y) {
 this.x = x;
 this.y = y;
}

}


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