小時候玩的遊戲，貪喫蛇，還真沒想過有一天我會自己去寫它，不管做的如何，此刻的心情還是不錯的
首先自然是確定窗口的大小，定義在常量類，
代碼：
package cn.zhang.snakeutil;
/**
*
* @author zyq_zhang
* 常量類，包含一些基本常量
*
*/
public class Constant {
public static final int ROWS = 40;//遊戲窗口行數
public static final int COLS = 40;//遊戲窗口列數
public static final int BLOCK_SIZE = 15;//蛇一小節的大小
}
代碼：
package cm.zhang.snakescr;
import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import cn.zhang.snakeutil.Constant;
import cn.zhang.snakeutil.Egg;
public class MySnake extends Frame {
private Image iBuffer;
private Graphics gBuffer;
private boolean flag = true;
private boolean gameOver = false;
private int Score = 0;
Snake snake = new Snake(this);
Egg e = new Egg();
private static final long serialVersionUID = 1L;
public MySnake(String s) {
super(s);
}
public void launchFrame() {
this.setSize(Constant.BLOCK_SIZE * Constant.COLS + 15, Constant.BLOCK_SIZE * Constant.ROWS + 7);
this.setLocation(100, 100);
this.setVisible(true);
// 設置監聽，關閉窗口
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
// 設置鍵盤監聽
this.addKeyListener(new KeyListen());
new FrameThread().start();
}
class KeyListen extends KeyAdapter {
public void keyPressed(KeyEvent e) {
snake.keyPressed(e);
}
}
/*
* 重畫！！！
*/
class FrameThread extends Thread {
public void run() {
while (flag) {// 死循環，不斷重畫
repaint();
try {
Thread.sleep(100);// 間隔120ms畫
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
public void paint(Graphics g) {
Color c = g.getColor();
this.setBackground(Color.GRAY);
g.setColor(Color.BLACK);
for (int i = 1; i < Constant.COLS; i++) {
g.drawLine(Constant.BLOCK_SIZE * i + 7, 0, Constant.BLOCK_SIZE * i + 7,
Constant.BLOCK_SIZE * Constant.ROWS);
}
for (int i = 1; i < Constant.ROWS; i++) {
g.drawLine(0, Constant.BLOCK_SIZE * i, Constant.BLOCK_SIZE * Constant.COLS + 8, Constant.BLOCK_SIZE * i);
}
g.setColor(Color.orange);
if (gameOver) {
g.setFont(new Font("宋體", Font.BOLD, 80));
g.drawString("遊戲結束", 120, 350);
flag = false;
}
if(!gameOver)
{
g.drawString("得分：" + Score, 50, 60);
}
this.setVisible(true);
snake.draw(g);
e.draw(g);
snake.eategg(e);
g.setColor(c);
}
public int getScore() {
return Score;
}
public void setScore(int score) {
Score = score;
}
// JAVA雙緩衝
public void update(Graphics scr) {
if (iBuffer == null) {
iBuffer = createImage(this.getSize().width, this.getSize().height);
gBuffer = iBuffer.getGraphics();
}
gBuffer.setColor(getBackground());
gBuffer.fillRect(0, 0, this.getSize().width, this.getSize().height);
paint(gBuffer);
scr.drawImage(iBuffer, 0, 0, this);
}
public static void main(String[] args) {
new MySnake("貪喫蛇").launchFrame();
}
public void stop() {
gameOver = true;
}
}
代碼：
package cm.zhang.snakescr;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.KeyEvent;
import cn.zhang.snakeutil.Constant;
import cn.zhang.snakeutil.Egg;
import cn.zhang.snakeutil.MoveDir;
public class Snake {
Node head = null;
Node tail = null;
private Node N = new Node(20, 20, MoveDir.L);
private MySnake m;
public Snake(MySnake m) {
this.head = N;
this.tail = N;
this.m=m;
}
public void draw(Graphics g) {
/* addToHead();
dellteTotill();*/
move();//其實它的語句就是上面兩句，但是一個方法儘量只做一件事，所以把它寫成一個單獨的函數
for (Node n = head; n != null; n = n.next) {
n.draw(g);
}
}
private void dellteTotill() {
tail = tail.prev;
tail.next = null;
}
public void addToTail() {
Node node = null;
switch (tail.dir) {
case L:
node = new Node(tail.row, tail.col + 1, tail.dir);
break;
case U:
node = new Node(tail.row + 1, tail.col, tail.dir);
break;
case R:
node = new Node(tail.row, tail.col - 1, tail.dir);
break;
case D:
node = new Node(tail.row - 1, tail.col, tail.dir);
break;
}
tail.next = node;
node.prev = tail;
tail= node;
}
public void addToHead() {
Node node = null;
switch (head.dir) {
case L:
node = new Node(head.row, head.col - 1, head.dir);
break;
case U:
node = new Node(head.row - 1, head.col, head.dir);
break;
case R:
node = new Node(head.row, head.col + 1, head.dir);
break;
case D:
node = new Node(head.row + 1, head.col, head.dir);
break;
}
node.next = head;
head.prev = node;
head = node;
}
private class Node {
int w = Constant.BLOCK_SIZE;
int h = Constant.BLOCK_SIZE;
int row, col;
MoveDir dir = MoveDir.L;
Node next = null;
Node prev = null;
Node(int row, int col, MoveDir dir) {
this.row = row;
this.col = col;
this.dir = dir;
}
void draw(Graphics g) {
Color c = g.getColor();
g.setColor(Color.BLACK);
g.fillRect(Constant.BLOCK_SIZE * col + 7, Constant.BLOCK_SIZE * row, w, h);
g.setColor(c);
}
}
public void move() {
addToHead();
dellteTotill();
ifDead();
}
public void eategg(Egg e){
if(this.getRect().intersects(e.getRect()))
{
this.addToHead();
e.Regenerate();
m.setScore(m.getScore()+5);
}
}
private Rectangle getRect(){
return new Rectangle(Constant.BLOCK_SIZE * head.col + 7, Constant.BLOCK_SIZE *head.row, head.w, head.h);
}
public void ifDead(){
//過了邊界，dead
if(head.row<0||head.row>Constant.ROWS||head.col<0||head.col>Constant.COLS){
m.stop();
}
//碰到自己身子，dead
for(Node n = head.next; n != null; n = n.next) {
if(head.row == n.row && head.col == n.col) {
m.stop();
}
}
}
/*
* 蛇不能往回走
*/
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
switch(key) {
case KeyEvent.VK_LEFT :
if(head.dir != MoveDir.R)
head.dir = MoveDir.L;
break;
case KeyEvent.VK_UP :
if(head.dir != MoveDir.D)
head.dir = MoveDir.U;
break;
case KeyEvent.VK_RIGHT :
if(head.dir != MoveDir.L)
head.dir = MoveDir.R;
break;
case KeyEvent.VK_DOWN :
if(head.dir != MoveDir.U)
head.dir = MoveDir.D;
break;
}
}
}
定義被蛇喫的一小格，俗稱蛋，被喫一個，在隨機產生一個
代碼：
package cn.zhang.snakeutil;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.util.Random;
public class Egg {
int row, col;
int w = Constant.BLOCK_SIZE;
int h = Constant.BLOCK_SIZE;
private static Random r = new Random();
private Color first=Color.RED;
public Egg(int row, int col) {
this.row = row;
this.col = col;
}
public Egg() {
this(r.nextInt(Constant.ROWS - 2) + 2, r.nextInt(Constant.COLS));
}
public Rectangle getRect() {
return new Rectangle(Constant.BLOCK_SIZE * col + 7, Constant.BLOCK_SIZE * row, w, h);
}
public void draw(Graphics g) {
Color c = g.getColor();
g.setColor(first);
g.fillRect(Constant.BLOCK_SIZE * col + 7, Constant.BLOCK_SIZE * row, w, h);
if(first==Color.RED) first=Color.GREEN;
else
first=Color.RED;
g.setColor(c);
}
public void Regenerate() {
this.row = r.nextInt(Constant.ROWS - 2) + 2;
this.col = r.nextInt(Constant.COLS);
}
}
一個枚舉類，蛇的運動方向
package cn.zhang.snakeutil;
/**
*
* 運動方向
*
*/
public enum MoveDir {
L,R,U,D;
}