贪吃蛇是一款休闲小游戏，相信很多小伙伴都玩过，如果我们会java的话，那么可以使用java开发贪吃蛇，那java贪吃蛇怎么可以让食物不闪屏?下面来我们就来给大家讲解一下。
主要用到双缓冲技术：
public void update(Graphics g)
{
Image bgImage = createImage(this.getSize()
.width, this.getSize()
.height);
Graphics bg = bgImage.getGraphics();
g.setColor(Color.black); //设置背景 g.fillRect(0, 0, 480, 480); bg.setColor(Color.green); // 食物颜色 bg.fill3DRect(foodx, foody, 10, 10, true); bg.setColor(Color.pink); for(i=0;i<=length-1;i++) bg.fill3DRect(m[i],n[i],10,10,true); //m[]x坐标 n[]y坐标 g.drawImage (bgImage, 0, 0, this); } public void paint(Graphics g){ update(g); }如何做一个简单的java贪吃蛇游戏?
主要有三个类，一个主类，一个食物类，一个贪吃蛇类。
1、首先定义主类，主类中主要用来创建窗口
public class Main
{
public static final int WIDTH = 600;
public static final int HEIGHT = 600;
public static void main(String[] args)
{
JFrame win = new JFrame();
win.setVisible(true);
win.setSize(WIDTH, HEIGHT);
win.setDefaultCloseOperation(3);
win.setLocationRelativeTo(null);
SnakePanel panle = new SnakePanel();
win.add(panle);
SnakePanel.Key l = panle.new Key();
win.addKeyListener(l);
panle.addKeyListener(l);
panle.run();
}
}2、其次是定义食物类，食物有长和宽，还有在窗口中的位置
import java.util.Random;
public class Cell
{
protected int x;
protected int y;
protected int width;
protected int height;
Random ran = new Random();
public Cell()
{
Random ran = new Random();
this.x = ran.nextInt(25) * 15 + 60;
this.y = ran.nextInt(25) * 15 + 50;
this.width = 15;
this.height = 15;
}
public Cell(int x, int y)
{
this();
this.x = x;
this.y = 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 int getWidth()
{
return width;
}
public void setWidth(int width)
{
this.width = width;
}
public int getHeight()
{
return height;
}
public void setHeight(int height)
{
this.height = height;
}
}3、最后是蛇类
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.Arrays;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JPanel;
public class SnakePanel extends JPanel
{
final int RIGHT = 1;
final int LEFT = 2;
final int UP = 3;
final int DOWN = 4;
int moved = 1;
Cell food;
Cell[] snake;
public SnakePanel()
{
food = new Cell();
snake = new Cell[5];
for (int i = 0; i < snake.length; i++)
{
< p = "" >
snake[i] = new Cell(210 + i * 15, 50);
}
}
class Key extends KeyAdapter
{
@Override
public void keyPressed(KeyEvent e)
{
int code = e.getKeyCode();
//System.out.println(code);
if (code == 37 && moved != RIGHT)
{
moved = LEFT;
}
if (code == 39 && moved != LEFT)
{
moved = RIGHT;
}
if (code == 38 && moved != DOWN)
{
moved = UP;
}
if (code == 40 && moved != UP)
{
moved = DOWN;
}
}
}
public void paint(Graphics g)
{
super.paint(g);
g.setFont(new Font(Font.SERIF, Font.BOLD, 28));
g.drawRect(60, 50, 450, 450);
for (int i = 15; i <= 450; i += 15)
{
g.drawLine(60 + i, 50, 60 + i, 500);
}
for (int i = 15; i <= 450; i += 15)
{
g.drawLine(60, 50 + i, 510, 50 + i);
}
g.setColor(Color.BLUE);
g.drawString("欢迎来到贪吃蛇大战", 140, 40);
g.fillRect(food.x, food.y, food.width, food.height);
for (int i = 0; i < snake.length; i++)
{
< p = "" >
g.fillRect(snake[i].x, snake[i].y, snake[i].width, snake[i].height);
}
}
int speed = 250;
public void run()
{
Timer timer = new Timer();
TimerTask task = new TimerTask()
{
@Override
public void run()
{
step();
repaint();
}
};
if (snake.length >= 10)
{
speed = 125;
}
else if (snake.length >= 20)
{
speed = 60;
}
else if (snake.length >= 30)
{
speed = 30;
}
else if (snake.length >= 40)
{
speed = 15;
}
timer.schedule(task, 1000, speed);
}
public void step()
{
for (int i = 1; i < snake.length; i++)
{
< p = "" >
snake[i - 1] = snake[i];
}
Cell c = new Cell(snake[snake.length - 1].getX(), snake[snake.length - 1].getY());
if (moved == RIGHT)
{
c.setX(c.getX() + 15);
}
if (moved == UP)
{
c.setY(c.getY() - 15);
}
if (moved == DOWN)
{
c.setY(c.getY() + 15);
}
if (moved == LEFT)
{
c.setX(c.getX() - 15);
}
snake[snake.length - 1] = c;
//System.out.println(c.getX()+","+c.getY());
if (snake[snake.length - 1].getX() > 510 ||
snake[snake.length - 1].getX() < 60 ||
snake[snake.length - 1].getY() > 500 ||
snake[snake.length - 1].getY() < 50)
{
System.exit(0);
}
if (snake[snake.length - 1].x == food.x && snake[snake.length - 1].y == food.y)
{
snake = Arrays.copyOf(snake, snake.length + 1);
snake[snake.length - 1] = food;
food = new Cell();
}
}
}到这里一个简单的贪吃蛇小游戏就完成了，其实开发贪吃蛇游戏主要就是开发思路，将思路理清，开发起来就会顺利很多!最后大家如果想要了解更多java实例知识，敬请关注奇Q工具网。
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