今天玩了一下swing，看到其中有网格布局模式，便想到用其实现一个简易的贪吃蛇。代码写起来也是简短精悍。
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| import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;
public class MySnake {
static final int width = 20;
static final int height = 20;
static int len = 3;
static int[] xArr = new int[400];
static int[] yArr = new int[400];
static int foodX = 13;
static int foodY = 13;
static int speed = 50;
static int dis = KeyEvent.VK_RIGHT;
static Random random = new Random();
public static void main(String[] args) {
JFrame frame = new JFrame();
JPanel[][] jPanels = new JPanel[width][height];
xArr[0] = 5;yArr[0] = 5;
xArr[1] = 5;yArr[0] = 4;
xArr[2] = 5;yArr[0] = 3;
frame.setTitle("Snake");
frame.setLayout(new GridLayout(20, 20, 0, 0));
frame.setBounds(1000, 500, 300, 300);
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
jPanels[i][j] = new JPanel();
frame.add(jPanels[i][j]);
}
}
paint(jPanels);
new Thread(() -> {
try {
for (; ; ) {
int xx = xArr[len - 1];int yy = yArr[len - 1];
for (int i = len - 1; i > 0; i--) {
xArr[i] = xArr[i - 1];
yArr[i] = yArr[i - 1];
}
switch (dis) {
case KeyEvent.VK_LEFT:
yArr[0] -= 1;
if (yArr[0] < 0) yArr[0] = 19;
break;
case KeyEvent.VK_UP:
xArr[0] -= 1;
if (xArr[0] < 0) xArr[0] = 19;
break;
case KeyEvent.VK_RIGHT:
yArr[0] += 1;
if (yArr[0] > 19) yArr[0] = 0;
break;
case KeyEvent.VK_DOWN:
xArr[0] += 1;
if (xArr[0] > 19) xArr[0] = 0;
break;
}
for (int i = 1; i < len; i++) {
if (xArr[0] == xArr[i] && yArr[0] == yArr[i]) {
throw new RuntimeException();
}
}
if (xArr[0] == foodX && yArr[0] == foodY) {
len++;
xArr[len - 1] = xx;
yArr[len - 1] = yy;
foodX = random.nextInt(20);
foodY = random.nextInt(20);
}
paint(jPanels);
Thread.sleep(speed);
}
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}).start();
frame.addKeyListener(new KeyListener() {
@Override
public void keyTyped(KeyEvent e) {}
@Override
public void keyPressed(KeyEvent e) {
dis = e.getKeyCode();
}
@Override
public void keyReleased(KeyEvent e) {}
});
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private static void paint(JPanel[][] jPanels) {
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
jPanels[i][j].setBackground(Color.WHITE);
}
}
for (int i = 0; i < len; i++) {
jPanels[xArr[i]][yArr[i]].setBackground(Color.BLACK);
}
jPanels[foodX][foodY].setBackground(Color.RED);
}
}
|
运行效果如下：
