1、本代碼主要功能為實現(xiàn)貪吃蛇游戲,GUI界面做到盡量簡潔和原游戲相仿。目前版本包含計分,統(tǒng)計最高分,長度自動縮短計時功能。
2、運行時請把.java文件放入default package 即可運行。
a)文件位置
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b)進入游戲
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c) 游戲進行中
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JAVA實現(xiàn)代碼
ALL RIGHTS RESERVED 3 import java.awt.*;
import java.awt.event.*;
importstatic java.lang.String.format; import java.util.*;
import java.util.List; import javax.swing.*;
Publicclass Snakeextends JPanel implements Runnable {
enum Dir {
up(0, -1), right(1, 0), down(0, 1), left(-1, 0);
Dir(intx, inty) { this.x = x; this.y = y;
}
finalintx, y;
}
staticfinal Random rand = new Random();
staticfinalintWALL = -1;
staticfinalintMAX_ENERGY = 1500;
volatilebooleangameOver = true;
Thread gameThread; intscore, hiScore; intnRows = 44;
intnCols = 64;
Dir dir; intenergy;
int[][] grid;
List《Point>snake, treats;
Font smallFont;
public Snake() {
setPreferredSize(new Dimension(640, 440));
setBackground(Color.white);
setFont(new Font(“SansSerif”, Font.BOLD, 48));
setFocusable(true);
smallFont = getFont().deriveFont(Font.BOLD, 18);
initGrid();
addMouseListener(new MouseAdapter() {
@Override
publicvoid mousePressed(MouseEvent e) {
if (gameOver) {
startNewGame();
repaint();
}
}
});
addKeyListener(new KeyAdapter() {
@Override
publicvoid keyPressed(KeyEvent e) {
switch (e.getKeyCode()) {
case KeyEvent.VK_UP: if (dir != Dir.down) dir = Dir.up; break;
case KeyEvent.VK_LEFT: if (dir != Dir.right) dir = Dir.left; break;
case KeyEvent.VK_RIGHT: if (dir != Dir.left) dir = Dir.right; break;
case KeyEvent.VK_DOWN: if (dir != Dir.up) dir = Dir.down; break;
}
repaint();
}
});
}
void startNewGame() { gameOver = false;
stop();
initGrid();
treats = new LinkedList<>();
dir = Dir.left;
energy = MAX_ENERGY;
if (score>hiScore) hiScore = score; score = 0;
snake = new ArrayList<>(); for (intx = 0; x< 7; x++) snake.add(new Point(nCols / 2 + x, nRows / 2));
do addTreat(); while(treats.isEmpty());
(gameThread = new Thread(this)).start();
}
void stop() {
if (gameThread != null) {
Thread tmp = gameThread; gameThread = null; tmp.interrupt();
}
}
void initGrid() { grid = newint[nRows][nCols]; for (intr = 0;
r《nRows; r++) { for (intc = 0; c
if (c == 0 || c == nCols - 1 || r == 0 || r == nRows - 1) grid[r][c] = WALL;
}
}
}
@Override
publicvoid run() {
while (Thread.currentThread() == gameThread) { try { Thread.sleep(Math.max(75 - score, 25));
} catch (InterruptedException e) {
return;
} if (energyUsed() || hitsWall() || hitsSnake()) {
gameOver();
} else {
if (eatsTreat()) { score++; energy = MAX_ENERGY;
growSnake();
}
moveSnake();
addTreat();
}
repaint();
}
} boolean energyUsed() { energy -= 10;
returnenergy<= 0;
}
boolean hitsWall() {
Point head = snake.get(0);
intnextCol = head.x + dir.x;
intnextRow = head.y + dir.y;
returngrid[nextRow][nextCol] == WALL;
}
boolean hitsSnake() {
Point head = snake.get(0);
intnextCol = head.x + dir.x;
intnextRow = head.y + dir.y;
for (Point p : snake) if (p.x == nextCol&&p.y == nextRow) returntrue; returnfalse;
}
boolean eatsTreat() {
Point head = snake.get(0);
intnextCol = head.x + dir.x; intnextRow = head.y + dir.y; for (Point p : treats) if (p.x == nextCol&&p.y == nextRow) { returntreats.remove(p);
}
returnfalse;
} void gameOver() { gameOver = true;
stop();
} void moveSnake() {
for (inti = snake.size() - 1; i> 0; i--) {
Point p1 = snake.get(i - 1);
Point p2 = snake.get(i); p2.x = p1.x;
p2.x = p1.x; p2.y = p1.y;
}
Point head = snake.get(0); head.x += dir.x; head.y += dir.y;
}
void growSnake() {
Point tail = snake.get(snake.size() - 1); intx = tail.x + dir.x; inty = tail.y + dir.y; snake.add(new Point(x, y));
} void addTreat() { if (treats.size() 《 3) {
if (rand.nextInt(10) == 0) { // 1 in 10 if (rand.nextInt(4) != 0) { // 3 in 4 intx, y; while (true) {
x = rand.nextInt(nCols);
y = rand.nextInt(nRows); if (grid[y][x] != 0) continue;
Point p = new Point(x, y);
if (snake.contains(p) || treats.contains(p)) continue;
treats.add(p); break;
}
}
elseif (treats.size() > 1) treats.remove(0);
}
}
}
void drawGrid(Graphics2D g) { g.setColor(Color.lightGray);
for (intr = 0; r
}
}
}
void drawSnake(Graphics2D g) { g.setColor(Color.blue); for (Point p : snake) g.fillRect(p.x * 10, p.y * 10, 10, 10);
g.setColor(energy< 500 ? Color.red : Color.orange);
Point head = snake.get(0);
g.fillRect(head.x * 10, head.y * 10, 10, 10);
}
void drawTreats(Graphics2D g) {
g.setColor(Color.green); for (Point p : treats) g.fillRect(p.x * 10, p.y * 10, 10, 10);}
void drawStartScreen(Graphics2D g) { g.setColor(Color.blue);
g.setFont(getFont());
g.drawString(“Snake”, 240, 190);
g.setColor(Color.orange); g.setFont(smallFont);
g.drawString(“(click to start)”, 250, 240);
}
void drawScore(Graphics2D g) { inth = getHeight();
g.setFont(smallFont);
g.setColor(getForeground());
String s = format(“hiscore %d score %d”, hiScore, score);
g.drawString(s, 30, h - 30);
g.drawString(format(“energy %d”, energy), getWidth() - 150, h - 30);
}
@Override
publicvoid paintComponent(Graphics gg) { super.paintComponent(gg);
Graphics2D g = (Graphics2D) gg;
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
drawGrid(g);
if (gameOver) {
drawStartScreen(g);
} else {
drawSnake(g);
drawTreats(g);
drawScore(g);
}
}
publicstaticvoid main(String[] args) {
SwingUtilities.invokeLater(() -> {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setTitle(“Snake”);
f.setResizable(false);
f.add(new Snake(), BorderLayout.CENTER);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
});
}
}
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