java贪吃蛇

java实现贪吃蛇小游戏

有两个类，放在同一文件下下即可，背景图片，标题，蛇尾可自行更改，

import java.awt.*;
import javax.swing.*;

import java.awt.event.*;
public class MyJFrame extends JFrame{

	public MyJFrame() {
		
		int x= Toolkit.getDefaultToolkit().getScreenSize().width;
		int y = Toolkit.getDefaultToolkit().getScreenSize().height;
		setLocation((x-800)/2, (y-800)/2);
		setSize(800,800);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setTitle("贪吃蛇");
		
		setLayout(null);
		
		getLayeredPane().setLayout(null);
		JLabel background = new JLabel(new ImageIcon("C:\\Users\\HP\\Desktop\\javaa\\background3.jpg"));//注意此处路径
		JLabel title = new JLabel(new ImageIcon("C:\\Users\\HP\\Desktop\\javaa\\title1.jpg"));//注意此处路径
		background.setBounds(20,80,750,650);
		title.setBounds(0,0,800,75);
		getLayeredPane().add(background,new Integer(Integer.MIN_VALUE));
		getLayeredPane().add(title,new Integer(Integer.MIN_VALUE+1));
		
		((JPanel)getContentPane()).setOpaque(false);
		
		MyPanel mypanel = new MyPanel();
		mypanel.setBounds(0,0,getWidth(),getHeight());
		add(mypanel);
	
	}
	
	public static void main(String[] args) {
		new MyJFrame();
	}
}

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.Random;

public class MyPanel extends JPanel implements ActionListener{
	int lenght ;
	int score1;
	Boolean jieshux = false;

	JLabel scorel = new JLabel("分数："+score1);
	JLabel lenghl = new JLabel("长度："+lenght);
	
	JLabel shibai = new JLabel("按下空格开始游戏!");
	JLabel jieshu = new JLabel("游戏失败！按空格重新开始！");
	
	String dir = "R";
	Boolean isstart = false;
	int[][] snake = new int[300][2];
	
	Random r = new Random();
	int x,y;
	
	//初始化
	public void initialize() {
		snake[0][0]=70;
		snake[0][1]=80;
		snake[1][0]=45;
		snake[1][1]=80;
		snake[2][0]=20;
		snake[2][1]=80;
		isstart = true;
		jieshux = false;
		lenght = 3;
		score1 = 0;
		dir = "R";
		repaint();
	}
	
	public MyPanel() {
		
		setLayout(null);
		scorel.setBounds(700, 20, 50, 30);
		lenghl.setBounds(700, 40, 50, 30);
		shibai.setBounds(300,400,200,60);
		shibai.setFont(new Font("黑体",Font.BOLD,20));
		jieshu.setFont(new Font("黑体",Font.BOLD,20));
		jieshu.setVisible(false);
		jieshu.setBounds(250,400,300,60);
		
		add(scorel);
		add(lenghl);
		add(shibai);
		add(jieshu);
		
		x = r.nextInt(29)*25+20;
		y = r.nextInt(25)*25+80;
		
		//this.setFocusable(true);	//焦点获取
		setOpaque(false);
		
		initialize();
		
		Timer t = new Timer(200,this);
		this.addKeyListener(new KeyAdapter() {
			public void keyPressed(KeyEvent e) {
				if(e.getKeyCode()==KeyEvent.VK_SPACE && isstart==false) {
					isstart=true;
				}else if(e.getKeyCode()==KeyEvent.VK_SPACE && isstart==true &&jieshux == false){
					isstart = false;
				}else if(e.getKeyCode()==KeyEvent.VK_W && isstart==true && dir!="D"&&jieshux == false) {
					dir="U";
				}else if(e.getKeyCode()==KeyEvent.VK_A && isstart==true && dir!="R"&&jieshux == false) {
					dir="L";
				}else if(e.getKeyCode()==KeyEvent.VK_D && isstart==true && dir!="L"&&jieshux == false) {
					dir="R";
				}else if(e.getKeyCode()==KeyEvent.VK_S && isstart==true && dir!="U"&&jieshux == false) {
					dir="D";
				}else if(e.getKeyCode()==KeyEvent.VK_SPACE && jieshux==true) {
					initialize();
				}
			}
		});
		t.start();

	}
	
	@Override
	public void actionPerformed(ActionEvent e) {
		this.requestFocus(true);

			if(isstart&&dir.equals("R")&&!jieshux) {
				for(int i=0;i<lenght-1;i++) {
					if(snake[i][0]>=745) {
						//snake[i][0]=20;
						jieshux = !jieshux;
						//isstart = !isstart;
						break;
					}else {
						snake[lenght-i-1][0]=snake[lenght-i-2][0];
						snake[lenght-i-1][1]=snake[lenght-i-2][1];
					}
				}
				if(!jieshux) snake[0][0]=snake[1][0]+25;
			} else if(isstart&&dir.equals("D")&&!jieshux) {
				for(int i=0;i<lenght-1;i++) {
					if(snake[i][1]>=705) {
						//snake[i][1]=80;
						jieshux = !jieshux;
						//isstart = !isstart;
						break;
					}else {
						snake[lenght-i-1][0]=snake[lenght-i-2][0];
						snake[lenght-i-1][1]=snake[lenght-i-2][1];
					}
				}
				if(!jieshux) snake[0][1]=snake[1][1]+25;
			}else if(isstart&&dir.equals("U")&&!jieshux) {
				for(int i=0;i<lenght-1;i++) {
					if(snake[i][1]<=80) {
						//snake[i][1]=705;
						jieshux = !jieshux;
						//isstart = !isstart;
						break;
					}else {
						snake[lenght-i-1][0]=snake[lenght-i-2][0];
						snake[lenght-i-1][1]=snake[lenght-i-2][1];
					}
				}
				if(!jieshux) snake[0][1]=snake[1][1]-25;
			}else if(isstart&&dir.equals("L")&&!jieshux) {
				for(int i=0;i<lenght-1;i++) {
					if(snake[i][0]<=20) {
						jieshux = !jieshux;
						//isstart = !isstart;
						break;
					}else {
						snake[lenght-i-1][0]=snake[lenght-i-2][0];
						snake[lenght-i-1][1]=snake[lenght-i-2][1];
					}
				}
				if(!jieshux) snake[0][0]=snake[1][0]-25;
			}

			if(snake[0][1]==y&&snake[0][0]==x) {
				x = r.nextInt(29)*25+20;
				y = r.nextInt(25)*25+80;
				
				score1+=10;
				lenght++;
				snake[lenght-1][1]=snake[lenght-2][1];
				snake[lenght-1][0]=snake[lenght-2][0];

				
				add(scorel);
				add(lenghl);
			}
			
			if(isstart==false) {
				shibai.setVisible(true);
			}else {
				shibai.setVisible(false);
				if(jieshux == false) {
					jieshu.setVisible(false);
				}else {
					jieshu.setVisible(true);
				}
			}
			
			for(int i = 1;i<lenght;i++) {
				if(snake[0][0]==snake[i][0]&&snake[0][1]==snake[i][1]) {
					jieshux=true;
				}
			}
			
			if(isstart&&!jieshux)repaint();
	}
	
	public void paint(Graphics g) {
		super.paint(g);
		//边界为（20，80），（770，730）
		scorel.setText("分数："+score1);
		lenghl.setText("长度："+lenght);
		
		g.drawLine(18, 78, 18, 732);
		g.drawLine(18, 78, 772, 78);
		g.drawLine(18, 732, 772, 732);
		g.drawLine(772, 78, 772, 732);
		//竖线
		for(int i=20;i<=770;i+=25) {
			g.drawLine(i,80,i,730);
			//g.drawLine(0,i,600,i);
		}
		
		//横线
		for(int i=80;i<=750;i+=25) {
			//g.drawLine(i,50,i,780);
			g.drawLine(20,i,770,i);
		}
		
		for(int i = 0;i<lenght;i++) {
			if(i>0) {
				g.drawImage(new ImageIcon("C:\\Users\\HP\\Desktop\\javaa\\body.png").getImage(), snake[i][0],snake[i][1],this);//注意此处路径
			}else {
				g.fillOval(snake[i][0], snake[i][1], 25, 25);
			}
		}
		
		g.setColor(Color.red);
		g.fillOval(x, y, 25, 25);
		
	}

}