安卓簡單技術-java代碼貪喫蛇

import java.awt.Color;  
import java.awt.Graphics;  
import java.awt.Graphics2D;  
import java.awt.Rectangle;  
import java.awt.event.KeyAdapter;  
import java.awt.event.KeyEvent;  
import java.awt.event.KeyListener;
import java.awt.image.BufferedImage;  
import java.util.ArrayList;  
import java.util.List;  
import javax.swing.JFrame;  
public class InterFace extends JFrame implements KeyListener{  
    public static final int WIDTH = 800, HEIGHT = 600, SLEEPTIME = 20, L = 1,R = 2, U = 3, D = 4;  

    BufferedImage offersetImage= new BufferedImage(WIDTH, HEIGHT,BufferedImage.TYPE_3BYTE_BGR);;  
    Rectangle rect = new Rectangle(20, 40, 15 * 50, 15 * 35);  
    Snake snake;  
    Node node;  
    public InterFace() {  
        snake = new Snake(this);
        createNode();  
        this.setBounds(100, 100, WIDTH, HEIGHT);   
        this.addKeyListener(new KeyAdapter() {  
            public void keyPressed(KeyEvent arg0) {  
                System.out.println(arg0.getKeyCode());  
                switch (arg0.getKeyCode()) {  
                case KeyEvent.VK_LEFT:  
                    snake.dir = L;  
                    break;  
                case KeyEvent.VK_RIGHT:  
                    snake.dir = R;  
                    break;  
                case KeyEvent.VK_UP:  
                    snake.dir = U;  
                    break;  
                case KeyEvent.VK_DOWN:  
                    snake.dir = D;  
                }  
            }  
        });  
        this.setTitle("貪喫蛇 0.1   By ： Easy");  
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);  
        this.setVisible(true);  
        new Thread(new ThreadUpadte()).start();  
    }  
    public void paint(Graphics g) {  
        Graphics2D g2d = (Graphics2D) offersetImage.getGraphics();  
        g2d.setColor(Color.white);  
        g2d.fillRect(0, 0, WIDTH, HEIGHT);  
        g2d.setColor(Color.black);  
        g2d.drawRect(rect.x, rect.y, rect.width, rect.height);  
        if (snake.hit(node)) {  
            createNode();  
        }  
        snake.draw(g2d);  
        node.draw(g2d);  
        g.drawImage(offersetImage, 0, 0, null);  
    }  
    class ThreadUpadte implements Runnable {  
        public void run() {  
            while (true) {  
                try {  
                    Thread.sleep(SLEEPTIME);  
                    repaint();  
                } catch (InterruptedException e) {  
                    e.printStackTrace();  
                }  
            }  
        }  
    }  
    public void createNode() {  
        int x = (int) (Math.random() * 650) + 50,y = (int) (Math.random() * 500) + 50;  
        Color color = Color.blue;  
        node = new Node(x, y, color);  
    }  
    public static void main(String args[]) {  
        new InterFace();  
    }
    @Override
    public void keyTyped(KeyEvent e) {
        // TODO Auto-generated method stub
        
    }
    @Override
    public void keyPressed(KeyEvent e) {
        // TODO Auto-generated method stub
        
    }
    @Override
    public void keyReleased(KeyEvent e) {
        // TODO Auto-generated method stub
        
    }  
}  
class Node {  
    int x, y, width = 15, height = 15;  
    Color color;  
    public Node(int x, int y, Color color) {  
        this(x, y);  
        this.color = color;  
    }  
    public Node(int x, int y) {  
        this.x = x;  
        this.y = y;  
        this.color = color.black;  
    }  
    public void draw(Graphics2D g2d) {  
        g2d.setColor(color);  
        g2d.drawRect(x, y, width, height);  
    }  
    public Rectangle getRect() {  
        return new Rectangle(x, y, width, height);  
    }  
}  
class Snake {  
    public List<Node> nodes = new ArrayList<Node>();  
    InterFace interFace;  
    int dir=InterFace.R;  
    public Snake(InterFace interFace) {  
        this.interFace = interFace;  
        nodes.add(new Node(20 + 150, 40 + 150));  
        addNode();  
    }  
    public boolean hit(Node node) {  
        for (int i = 0; i < nodes.size(); i++) {  
            if (nodes.get(i).getRect().intersects(node.getRect())) {  
                addNode();  
                return true;  
            }  
        }  
        return false;  
    }  
    public void draw(Graphics2D g2d) {  
        for (int i = 0; i < nodes.size(); i++) {  
            nodes.get(i).draw(g2d);  
        }  
        move();  
    }  
    public void move() {  
        nodes.remove((nodes.size() -1));  
        addNode();  
    }  
    public synchronized void addNode() {  
        Node nodeTempNode = nodes.get(0);  
        switch (dir) {  
        case InterFace.L:  
            if (nodeTempNode.x <= 20) {  
                nodeTempNode = new Node(20 + 15 * 50, nodeTempNode.y);  
            }  
            nodes.add(0, new Node(nodeTempNode.x - nodeTempNode.width,  
                    nodeTempNode.y));  
            break;  
        case InterFace.R:  
            if (nodeTempNode.x >= 20 + 15 * 50 - nodeTempNode.width) {  
                nodeTempNode = new Node(20 - nodeTempNode.width, nodeTempNode.y);  
            }  
            nodes.add(0, new Node(nodeTempNode.x + nodeTempNode.width,  
                    nodeTempNode.y));  
            break;  
        case InterFace.U:  
            if (nodeTempNode.y <= 40) {  
                nodeTempNode = new Node(nodeTempNode.x, 40 + 15 * 35);  
            }  
            nodes.add(0, new Node(nodeTempNode.x, nodeTempNode.y - nodeTempNode.height));  
            break;  
        case InterFace.D:  
            if (nodeTempNode.y >= 40 + 15 * 35 - nodeTempNode.height) {  
                nodeTempNode = new Node(nodeTempNode.x,40 - nodeTempNode.height);  
            }  
            nodes.add(0, new Node(nodeTempNode.x, nodeTempNode.y + nodeTempNode.height));  
            break;  
        }  
    }  
}