Java 蛇类游戏如何使尾巴跟随头部？
我在做一个蛇的游戏，我被困在尾巴跟着头的地方。我听说在头部和尾部使用添加和删除可以实现这一点，但我不知道从哪里开始 以下是我目前的代码： Screen.javaJava 蛇类游戏如何使尾巴跟随头部？,java,swing,Java,Swing,我在做一个蛇的游戏，我被困在尾巴跟着头的地方。我听说在头部和尾部使用添加和删除可以实现这一点，但我不知道从哪里开始 以下是我目前的代码： Screen.java public class Screen extends JPanel implements ActionListener, KeyListener { public static final JLabel statusbar = new JLabel("Default"); public static final int
public class Screen extends JPanel implements ActionListener, KeyListener {
public static final JLabel statusbar = new JLabel("Default");
public static final int WIDTH = 800, HEIGHT = 800;
Timer t = new Timer(100, this);
int x = 400;
int y = 400;
int size = 5; //increase size if eat
private boolean right = false, left = false, up = false, down = false;
int head = 0;
private LinkedList<BodyPart> snake = new LinkedList<BodyPart>();
private BodyPart b;
public Screen(){
initSnake();
t.start();
addKeyListener(this);
setFocusable(true);
setFocusTraversalKeysEnabled(false);
}
public void update(){
}
public void direction(){
if(right) x+=10;
if(left) x-=10;
if(up) y-=10;
if(down) y+=10;
}
public void trackOutBound(){
if(x < 0 || x > 800 || y < 0 || y > 800) {
x = 400;
y = 400;
}
}
public void initSnake(){
if(snake.size() == 0){
b = new BodyPart(x, y);
for(int i = 0; i < size; i++) {
snake.add(b);
}
System.out.println(snake);
}
}
public static void main(String[] args) {
}
@Override
public void paintComponent(Graphics g){
super.paintComponent(g);
g.setColor(new Color(10, 50, 0));
g.fillRect(0, 0, WIDTH, HEIGHT);
g.setColor(Color.BLACK);
for(int i = 0; i < WIDTH / 10; i++) {
g.drawLine(i * 10, 0, i * 10, HEIGHT);
}
for(int i = 0; i < HEIGHT / 10; i++) {
g.drawLine(0, i * 10, WIDTH, i * 10);
}
int tempx = 0, tempy = 0;
int temp = 0;
for(int i = 0; i < size; i++){
if(i == head) {
snake.get(i).x = x;
snake.get(i).y = y;
snake.get(i).draw(g);
g.setColor(Color.blue);
g.fillRect(x, y, 10, 10);
g.setColor(Color.white);
g.drawRect(x, y, 10, 10);
} else if(i > 0 && up) {
snake.get(i).x = x;
snake.get(i).y = y + temp;
snake.get(i).draw(g);
} else if(i > 0 && down) {
snake.get(i).x = x;
snake.get(i).y = y - temp;
snake.get(i).draw(g);
} else if(i > 0 && left) {
snake.get(i).x = x + temp;
snake.get(i).y = y;
snake.get(i).draw(g);
} else if(i > 0 && right) {
snake.get(i).x = x - temp;
snake.get(i).y = y;
snake.get(i).draw(g);
}
temp += 10;
}
/*
if(snake.size() == 5){
snake.add(b);
size += 1;
}
*/
}
@Override
public void actionPerformed(ActionEvent e) {
direction();
trackOutBound();
repaint();
// System.out.println(snake);
statusbar.setText("(" + x + " , " + y + ")");
}
@Override
public void keyTyped(KeyEvent e) {}
@Override
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
if(key == KeyEvent.VK_RIGHT && !left) {
up = false;
down = false;
right = true;
}
if(key == KeyEvent.VK_LEFT && !right) {
up = false;
down = false;
left = true;
}
if(key == KeyEvent.VK_UP && !down) {
left = false;
right = false;
up = true;
}
if(key == KeyEvent.VK_DOWN && !up) {
left = false;
right = false;
down = true;
}
}
@Override
public void keyReleased(KeyEvent e) {}
}
public class BodyPart {
int x;
int y;
public BodyPart(int x, int y) {
this.x = x;
this.y = y;
}
public void draw(Graphics g) {
this.x = x;
this.y = y;
g.setColor(Color.red);
g.fillRect(x, y, 10, 10);
g.setColor(Color.white);
g.drawRect(x, y, 10, 10);
}
}
public class Frame extends JPanel {
private static JLabel statusbar = new JLabel("Default");
public void statusbar(){
statusbar = Screen.statusbar;
}
public static void main(String[] args) {
JFrame f = new JFrame();
Screen s = new Screen();
f.add(s);
f.add(statusbar, BorderLayout.SOUTH);
f.setSize(800, 800);
f.setVisible(true);
f.setLocationRelativeTo(null);
f.setResizable(false);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
public class Screen extends JPanel implements ActionListener, KeyListener {
public static final JLabel statusbar = new JLabel("Default");
public static final int WIDTH = 800, HEIGHT = 800;
Timer t = new Timer(100, this);
int x = 400;
int y = 400;
int size = 5; //increase size if eat
private boolean right = false, left = false, up = false, down = false;
int head = 0;
private LinkedList<BodyPart> snake = new LinkedList<BodyPart>();
private BodyPart b;
public Screen(){
initSnake();
t.start();
addKeyListener(this);
setFocusable(true);
setFocusTraversalKeysEnabled(false);
}
public void update(){
}
public void direction(){
if(right) x+=10;
if(left) x-=10;
if(up) y-=10;
if(down) y+=10;
}
public void trackOutBound(){
if(x < 0 || x > 800 || y < 0 || y > 800) {
x = 400;
y = 400;
}
}
public void initSnake(){
if(snake.size() == 0){
b = new BodyPart(x, y);
for(int i = 0; i < size; i++) {
snake.add(b);
}
System.out.println(snake);
}
}
public static void main(String[] args) {
}
@Override
public void paintComponent(Graphics g){
super.paintComponent(g);
g.setColor(new Color(10, 50, 0));
g.fillRect(0, 0, WIDTH, HEIGHT);
g.setColor(Color.BLACK);
for(int i = 0; i < WIDTH / 10; i++) {
g.drawLine(i * 10, 0, i * 10, HEIGHT);
}
for(int i = 0; i < HEIGHT / 10; i++) {
g.drawLine(0, i * 10, WIDTH, i * 10);
}
int tempx = 0, tempy = 0;
int temp = 0;
for(int i = 0; i < size; i++){
if(i == head) {
snake.get(i).x = x;
snake.get(i).y = y;
snake.get(i).draw(g);
g.setColor(Color.blue);
g.fillRect(x, y, 10, 10);
g.setColor(Color.white);
g.drawRect(x, y, 10, 10);
} else if(i > 0 && up) {
snake.get(i).x = x;
snake.get(i).y = y + temp;
snake.get(i).draw(g);
} else if(i > 0 && down) {
snake.get(i).x = x;
snake.get(i).y = y - temp;
snake.get(i).draw(g);
} else if(i > 0 && left) {
snake.get(i).x = x + temp;
snake.get(i).y = y;
snake.get(i).draw(g);
} else if(i > 0 && right) {
snake.get(i).x = x - temp;
snake.get(i).y = y;
snake.get(i).draw(g);
}
temp += 10;
}
/*
if(snake.size() == 5){
snake.add(b);
size += 1;
}
*/
}
@Override
public void actionPerformed(ActionEvent e) {
direction();
trackOutBound();
repaint();
// System.out.println(snake);
statusbar.setText("(" + x + " , " + y + ")");
}
@Override
public void keyTyped(KeyEvent e) {}
@Override
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
if(key == KeyEvent.VK_RIGHT && !left) {
up = false;
down = false;
right = true;
}
if(key == KeyEvent.VK_LEFT && !right) {
up = false;
down = false;
left = true;
}
if(key == KeyEvent.VK_UP && !down) {
left = false;
right = false;
up = true;
}
if(key == KeyEvent.VK_DOWN && !up) {
left = false;
right = false;
down = true;
}
}
@Override
public void keyReleased(KeyEvent e) {}
}
public class BodyPart {
int x;
int y;
public BodyPart(int x, int y) {
this.x = x;
this.y = y;
}
public void draw(Graphics g) {
this.x = x;
this.y = y;
g.setColor(Color.red);
g.fillRect(x, y, 10, 10);
g.setColor(Color.white);
g.drawRect(x, y, 10, 10);
}
}
public class Frame extends JPanel {
private static JLabel statusbar = new JLabel("Default");
public void statusbar(){
statusbar = Screen.statusbar;
}
public static void main(String[] args) {
JFrame f = new JFrame();
Screen s = new Screen();
f.add(s);
f.add(statusbar, BorderLayout.SOUTH);
f.setSize(800, 800);
f.setVisible(true);
f.setLocationRelativeTo(null);
f.setResizable(false);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
感谢您蛇形移动，您可以从尾部到头部，将每个
身体部位身体部位身体部位身体部位列表。从概念上讲，列表
将包含虚拟坐标，即1x1
将表示虚拟空间中的坐标，该坐标表示虚拟板上的一个位置（具有一定的宽度和高度）
然后可以将其转换到屏幕上，这样就可以使蛇的每个部分都比单个像素大。因此，如果每个部分都是5x5
像素，那么1x1
实际上就是屏幕上的5x5
每次蛇移动时，您都会向头部添加一个新值，并从尾部删除最后一个值（假设它没有增长）。当需要绘制蛇时，只需在列表上迭代，绘制蛇的每个点
下面是一个简单的示例，它使用一个链接列表
，将一个新的点
推到列表
，创建一个新的头部，并删除每个循环中的最后一个元素（尾部）
这基本上可以归结为
snakeBody.removeLast();
snakeBody.push(new Point(xPos, yPos));
作为一个可运行的概念
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.LinkedList;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Snake {
public static void main(String[] args) {
new Snake();
}
public Snake() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public static class TestPane extends JPanel {
public enum Direction {
UP, DOWN, LEFT, RIGHT
}
private int xPos, yPos;
private Direction direction = Direction.UP;
private LinkedList<Point> snakeBody = new LinkedList<>();
public TestPane() {
xPos = 100;
yPos = 100;
for (int index = 0; index < 50; index++) {
snakeBody.add(new Point(xPos, yPos));
}
bindKeyStrokeTo("up.pressed", KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, false), new MoveAction(Direction.UP));
bindKeyStrokeTo("down.pressed", KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, false), new MoveAction(Direction.DOWN));
bindKeyStrokeTo("left.pressed", KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0, false), new MoveAction(Direction.LEFT));
bindKeyStrokeTo("right.pressed", KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0, false), new MoveAction(Direction.RIGHT));
Timer timer = new Timer(40, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
switch (direction) {
case UP:
yPos--;
break;
case DOWN:
yPos++;
break;
case LEFT:
xPos--;
break;
case RIGHT:
xPos++;
break;
}
if (yPos < 0) {
yPos--;
} else if (yPos > getHeight() - 1) {
yPos = getHeight() - 1;
}
if (xPos < 0) {
xPos--;
} else if (xPos > getWidth() - 1) {
xPos = getWidth() - 1;
}
snakeBody.removeLast();
snakeBody.push(new Point(xPos, yPos));
repaint();
}
});
timer.start();
}
public void bindKeyStrokeTo(String name, KeyStroke keyStroke, Action action) {
InputMap im = getInputMap(WHEN_IN_FOCUSED_WINDOW);
ActionMap am = getActionMap();
im.put(keyStroke, name);
am.put(name, action);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
g2d.setColor(Color.RED);
for (Point p : snakeBody) {
g2d.drawLine(p.x, p.y, p.x, p.y);
}
g2d.dispose();
}
public class MoveAction extends AbstractAction {
private Direction moveIn;
public MoveAction(Direction direction) {
this.moveIn = direction;
}
@Override
public void actionPerformed(ActionEvent e) {
direction = this.moveIn;
}
}
}
}
导入java.awt.Color；
导入java.awt.Dimension；
导入java.awt.EventQueue；
导入java.awt.Graphics；
导入java.awt.Graphics2D；
导入java.awt.Point；
导入java.awt.event.ActionEvent；
导入java.awt.event.ActionListener；
导入java.awt.event.KeyEvent；
导入java.util.LinkedList；
导入javax.swing.AbstractAction；
导入javax.swing.Action；
导入javax.swing.ActionMap；
导入javax.swing.InputMap；
导入javax.swing.JFrame；
导入javax.swing.JPanel；
导入javax.swing.KeyStroke；
导入javax.swing.Timer；
导入javax.swing.UIManager；
导入javax.swing.UnsupportedLookAndFeelException；
公营蛇{
公共静态void main（字符串[]args）{
新蛇（）；
}
公蛇（{
invokeLater（新的Runnable（）{
@凌驾
公开募捐{
试一试{
UIManager.setLookAndFeel（UIManager.getSystemLookAndFeelClassName（））；
}catch（ClassNotFoundException |实例化Exception | IllegalacessException |不支持ookandfeelException ex）{
例如printStackTrace（）；
}
JFrame=新JFrame（“测试”）；
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）；
frame.add（newtestpane（））；
frame.pack（）；
frame.setLocationRelativeTo（空）；
frame.setVisible（true）；
}
});
}
公共静态类TestPane扩展了JPanel{
公共枚举方向{
上、下、左、右
}
私人int XPO、YPO；
专用方向=方向.UP；
私有LinkedList snakeBody=新LinkedList（）；
公共测试窗格（）{
xPos=100；
yPos=100；
对于（int-index=0；index<50；index++）{
添加（新点（xPos、YPO））；
}
bindKeyStrokeTo（“向上.按下”，KeyStroke.getKeyStroke（KeyEvent.VK_up，0，false），new MoveAction（Direction.up））；
bindKeyStrokeTo（“向下.按下”，KeyStroke.getKeyStroke（KeyEvent.VK_向下，0，false），new MoveAction（Direction.down））；
bindKeyStrokeTo（“left.pressed”、KeyStroke.getKeyStroke（KeyEvent.VK_left，0，false）、new MoveAction（Direction.left））；
bindKeyStrokeTo（“right.pressed”、KeyStroke.getKeyStroke（KeyEvent.VK_right，0，false）、new-MoveAction（Direction.right））；
计时器计时器=新计时器（40，新ActionListener（）{
@凌驾
已执行的公共无效操作（操作事件e）{
开关（方向）{
个案：
yPos--；
打破
按大小写：
yPos++；
打破
案例左：
xPos--；
打破
案例权利：
xPos++；
打破
}
if（yPos<0）{
yPos--；
}else if（yPos>getHeight（）-1）{
yPos=getHeight（）-1；
}
如果（xPos<0）{
xPos--；
}else if（xPos>getWidth（）-1）{
xPos=getWidth（）-1；
}
蛇体。removeLast（）；
蛇身推进（新点（xPos，YPO））；
雷帕