贪吃蛇（Java）、AWT/Swing

package com.xs; 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 SnakeJpanel extends JPanel implements KeyListener, ActionListener { ImageIcon up = new ImageIcon(getClass().getResource("/pic/up.png")); ImageIcon down = new ImageIcon(getClass().getResource("/pic/down.png")); ImageIcon left = new ImageIcon(getClass().getResource("/pic/left.png")); ImageIcon right = new ImageIcon(getClass().getResource("/pic/right.png")); ImageIcon title = new ImageIcon(getClass().getResource("/pic/title.jpg")); ImageIcon food = new ImageIcon(getClass().getResource("/pic/food.png")); ImageIcon body = new ImageIcon(getClass().getResource("/pic/body.png")); int[] sx = new int[200]; int[] sy = new int[200]; int len = 3; String fx = "R";//R,L,U,D右左上下方向 boolean isStart = false; boolean isFailed = false; int time = 100; Random random = new Random(); int foodx = random.nextInt(34) * 25 + 25; int foody = random.nextInt(24) * 25 + 75; Timer timer = new Timer(time, this); public SnakeJpanel() { this.setFocusable(true); this.addKeyListener(this); timer.start(); this.setUp(); } public void paint(Graphics g) { title.paintIcon(this, g, 25, 11); g.fillRect(25, 75, 850, 600); //蛇头 if(fx.equals("R")) { right.paintIcon(this, g, sx[0], sy[0]); }else if(fx.equals("L")) { left.paintIcon(this, g, sx[0], sy[0]); }else if(fx.equals("U")) { up.paintIcon(this, g, sx[0], sy[0]); }else if(fx.equals("D")) { down.paintIcon(this, g, sx[0], sy[0]); } //蛇身 for (int i = 0; i < len; i++) { body.paintIcon(this, g, sx[i], sy[i]); } if(!isStart) { g.setColor(Color.RED); g.setFont(new Font("arial", Font.BOLD, 30)); g.drawString("Press space to start/pause", 250, 350); } if(isFailed) { g.setColor(Color.RED); g.setFont(new Font("arial", Font.BOLD, 30)); g.drawString("Score:" + (len-3), 390, 250); g.drawString("Game Over!Press space to restart", 250, 350); } food.paintIcon(this, g, foodx, foody); } public void setUp() { isFailed = false; isStart = false; len = 3; fx = "R"; sx[0] = 100; sy[0] = 75; sx[1] = 75; sy[1] = 75; sx[2] = 50; sy[2] = 75; } @Override public void keyPressed(KeyEvent e) { if(e.getKeyCode() == KeyEvent.VK_SPACE) { isStart = !isStart; if(isFailed) { this.setUp(); } }else if(e.getKeyCode() == KeyEvent.VK_UP) { if(sx[0] == sx[1]) { return; } fx = "U"; }else if(e.getKeyCode() == KeyEvent.VK_DOWN) { if(sx[0] == sx[1]) { return; } fx = "D"; }else if(e.getKeyCode() == KeyEvent.VK_LEFT) { if(sy[0] == sy[1]) { return; } fx = "L"; }else if(e.getKeyCode() == KeyEvent.VK_RIGHT) { if(sy[0] == sy[1]) { return; } fx = "R"; } repaint(); } @Override public void actionPerformed(ActionEvent e) { //再定一个闹钟 timer.start(); if(isStart && !isFailed) { //移动身体 for (int i = len; i > 0; i--) { sx[i] = sx[i-1]; sy[i] = sy[i-1]; } //移动头 if(fx.equals("R")) { sx[0] = sx[0] + 25; if(sx[0] > 850) { isFailed = true; } }else if(fx.equals("L")) { sx[0] = sx[0] - 25; if(sx[0] < 25) { isFailed = true; } }else if(fx.equals("U")) { sy[0] = sy[0] - 25; if(sy[0] < 75) { isFailed = true; } }else if(fx.equals("D")) { sy[0] = sy[0] + 25; if(sy[0] > 650){ isFailed = true; } } for (int i = 1; i < len; i++) { if(sx[0] == sx[i] && sy[0] == sy[i]) { isFailed = true; } } //吃食物 if(sx[0] == foodx && sy[0] == foody) { len = len + 1; foodx = random.nextInt(34) * 25 + 25; foody = random.nextInt(24) * 25 + 75; } } //重画 repaint(); } @Override public void keyReleased(KeyEvent e) { // TODO 自动生成的方法存根 } @Override public void keyTyped(KeyEvent e) { // TODO 自动生成的方法存根 } }