GUI编程

04 贪吃蛇小游戏

4.1 第一步：先绘制一个静态的面板

首先，需要新建两个类，一个StartGame类作为游戏的主启动类；一个GamePanel类作为游戏的面板类。此外，再新建一个Data类作为数据中心(存放了小蛇各部分图像的URL及ImageIcon)。代码如下：

StartGame：

package com.duo.snake;

import javax.swing.*;

//游戏的主启动类
public class StartGame {

    public static void main(String[] args) {
        JFrame frame = new JFrame();

        frame.setVisible(true);
        frame.setResizable(false);
        frame.setTitle("贪吃蛇-2023");
        frame.setBounds(5, 10, 915, 740);
        frame.setLocationRelativeTo(null);

        frame.add(new GamePanel());

        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

GamePanel：

package com.duo.snake;

import javax.swing.*;
import java.awt.*;

//游戏的面板
public class GamePanel extends JPanel {

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);  //起到清屏的作用

        //先绘制一个静态的面板
        Data.header.paintIcon(this, g, 25, 11);
        g.fillRect(25, 75, 850, 600);

        this.setBackground(Color.white);

    }
}

Data：

package com.duo.snake;

import javax.swing.*;
import java.net.URL;

//数据中心
public class Data {

    //相对路径  tx.jpg
    //绝对路径  /：相当于当前的项目
    public static URL headerURL = Data.class.getResource("static/header.png");
    public static URL upURL = Data.class.getResource("static/up.png");
    public static URL downURL = Data.class.getResource("static/down.png");
    public static URL leftURL = Data.class.getResource("static/left.png");
    public static URL rightURL = Data.class.getResource("static/right.png");
    public static URL bodyURL = Data.class.getResource("static/body.png");
    public static URL foodURL = Data.class.getResource("static/food.png");

    public static ImageIcon header = new ImageIcon(headerURL);
    public static ImageIcon up = new ImageIcon(upURL);
    public static ImageIcon down = new ImageIcon(downURL);
    public static ImageIcon left = new ImageIcon(leftURL);
    public static ImageIcon right = new ImageIcon(rightURL);
    public static ImageIcon body = new ImageIcon(bodyURL);
    public static ImageIcon food = new ImageIcon(foodURL);

}

最后，通过StartGame中main方法，显示当前绘制的静态窗口如下：

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