使用java完成贪吃蛇小游戏，向我展示代码

使用java完成贪吃蛇小游戏的代码如下：import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.Timer;public class Gameplay extends JPanel implements KeyListener, ActionListener{
private int[] snakexlength = new int[750];
private int[] snakeylength = new int[750];

private boolean left = false;
private boolean right = false;
private boolean up = false;
private boolean down = false;

private ImageIcon rightmouth;
private ImageIcon leftmouth;
private ImageIcon upmouth;
private ImageIcon downmouth;

private int lengthofsnake = 3;

private Timer timer;
private int delays = 100;

private ImageIcon snakeimage;

private int[] enemyxpos = {25,50,75,100,125,150,175,200,225,250,275,300,325,350,375,400,425,450,475,500,525,550,575,600,625,650,675,700,725,750,775,800,825,850};
private int[] enemyypos = {75,100,125,150,175,200,225,250,275,300,325,350,375,400,425,450,475,500,525,550,575,600,625};

private ImageIcon enemyimage;
private Random random = new Random();

private int xpos = random.nextInt(34);
private int ypos = random.nextInt(23);

private int score = 0;

private int moves = 0;

public Gameplay(){
addKeyListener(this);
setFocusable(true);
setFocusTraversalKeysEnabled(false);
timer = new Timer(delays, this);
timer.start();
}

public void paint(Graphics g){
if(moves == 0){
snakexlength[2] = 50;
snakexlength[1] = 75;
snakexlength[0] = 100;

snakeylength[2] = 100;
snakeylength[1] = 100;
snakeylength[0] = 100;
}

//draw title image border
g.setColor(Color.white);
g.drawRect(24, 10, 851, 55);

//draw the title image
rightmouth = new ImageIcon("rightmouth.png");
rightmouth.paintIcon(this, g, snakexlength[0], snakeylength[0]);

//draw border for gameplay
g.setColor(Color.white);
g.drawRect(24, 74, 851, 577);

//draw background for the gameplay
g.setColor(Color.BLACK);
g.fillRect(25, 75, 850, 575);

//draw scores
g.setColor(Color.white);
g.setFont(new Font("arial", Font.PLAIN, 14));
g.drawString("Scores: "+score, 780, 30);

//draw length
g.setColor(Color.white);
g.setFont(new Font("arial", Font.PLAIN, 14));
g.drawString("Length: "+lengthofsnake, 780, 50);

rightmouth = new ImageIcon("rightmouth.png");
rightmouth.paintIcon(this, g, snakexlength[0], snakeylength[0]);

for(int a = 0; a < lengthofsnake; a++){
if(a==0 && right){
rightmouth = new ImageIcon("rightmouth.png");
rightmouth.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
if(a==0 && left){
leftmouth = new ImageIcon("leftmouth.png");
leftmouth.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
if(a==0 && down){
downmouth = new ImageIcon("downmouth.png");
downmouth.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
if(a==0 && up){
upmouth = new ImageIcon("upmouth.png");
upmouth.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
if(a!=0){
snakeimage = new ImageIcon("snakeimage.png");
snakeimage.paintIcon(this, g, snakexlength[a], snakeylength[a]);
}
}

enemyimage = new ImageIcon("enemy.png");

if(enemyxpos[xpos] == snakexlength[0] && enemyypos[ypos] == snakeylength[0]){
score++;
lengthofsnake++;
xpos = random.nextInt(34);
ypos = random.nextInt(23);
}

enemyimage.paintIcon(this, g, enemyxpos[xpos], enemyypos[ypos]);

for(int b = 1; b < lengthofsnake; b++){
if(snakexlength[b] == snakexlength[0] && snakeylength[b] == snakeylength[0]){
right = false;
left = false;
up = false;
down = false;

g.setColor(Color.white);
g.setFont(new Font("arial", Font.BOLD, 50));
g.drawString("Game Over", 300, 300);

g.setFont(new Font("arial", Font.BOLD, 20));
g.drawString("Space to RESTART", 350, 340);
}
}

g.dispose();
}

@Override
public void actionPerformed(ActionEvent e) {
timer.start();
if(right){
for(int r = lengthofsnake-1; r>=0; r--){
snakeylength[r+1] = snakeylength[r];
}
for(int r = lengthofsnake; r>=0; r--){
if(r==0){
snakexlength[r] = snakexlength[r] + 25;
}
else{
snakexlength[r] = snakexlength[r-1];
}
if(snakexlength[r] > 850){
snakexlength[r] = 25;
}
}
repaint();
}
if(left){
for(int r = lengthofsnake-1; r>=0; r--){
snakeylength[r+1] = snakeylength[r];
}
for(int r = lengthofsnake; r>=0; r--){
if(r==0){
snakexlength[r] = snakexlength[r] - 25;
}
else{
snakexlength[r] = snakexlength[r-1];
}
if(snakexlength[r] < 25){
snakexlength[r] = 850;
}
}
repaint();
}
if(up){
for(int r = lengthofsnake-1; r>=0; r--){
snakexlength[r+1] = snakexlength[r];
}
for(int r = lengthofsnake; r>=0; r--){
if(r==0){
snakeylength[r] = snakeylength[r] - 25;
}
else{
snakeylength[r] = snakeylength[