黑客帝国里的代码雨-java代码实现

Love The Way You Lie 2022-04-12 07:15 288阅读 0赞

我一直很好奇黑客帝国里的代码雨，感觉很酷，就一直搜集资料，尝试使用Java来实现，终于成功了，分享一下啊

代码雨的实现用到的是jdk自身带的类库，可能很多小伙伴不知道Java安装JDK就可以做C/S（客户/服务器）桌面应用软件开发，现在使用较多的是B/S(浏览器/服务器）模式。好了闲话少叙，只要你的的电脑支持桌面显示（Linux服务器纯命令行除外），那么ni只需要安装好java的JDK（配置好环境变量，这个网上有很多教程），外加一个可使用的文本编辑器，就能做出本次超酷的代码雨喽。

源代码如下，将其保存为Rain.java

import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.KeyAdapter;
    import java.awt.event.KeyEvent;
    import java.awt.image.MemoryImageSource;
    import java.util.Random;
    import javax.swing.JDialog;
    import javax.swing.JPanel;
    import javax.swing.Timer;
    
    public class Rain extends JDialog implements ActionListener {
    
        private Random random = new Random();
        private Dimension screenSize;
        private JPanel graphicsPanel;
        //行高,列宽
        private final static int gap = 20;
        //存放雨点顶部的位置信息(marginTop)
        private int[] posArr;
        //行数
        private int lines;
        //列数
        private int columns;
    
        public Rain() {
            initComponents();
        }
    
        private void initComponents() {
            setLayout(new BorderLayout());
            graphicsPanel = new GraphicsPanel();
            add(graphicsPanel, BorderLayout.CENTER);
            //设置光标不可见
            Toolkit defaultToolkit = Toolkit.getDefaultToolkit();
            Image image = defaultToolkit.createImage(new MemoryImageSource(0, 0, null, 0, 0));
            Cursor invisibleCursor = defaultToolkit.createCustomCursor(image, new Point(0, 0), "cursor");
            setCursor(invisibleCursor);
            //ESC键退出
            KeyPressListener keyPressListener = new KeyPressListener();
            this.addKeyListener(keyPressListener);
            //this.setAlwaysOnTop(true);
            //去标题栏
            this.setUndecorated(true);
            //全屏
            this.getGraphicsConfiguration().getDevice().setFullScreenWindow(this);
            this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
            setVisible(true);
    
            screenSize = Toolkit.getDefaultToolkit().getScreenSize();
            lines = screenSize.height / gap;
            columns = screenSize.width / gap;
    
            posArr = new int[columns + 1];
            random = new Random();
            for (int i = 0; i < posArr.length; i++) {
                posArr[i] = random.nextInt(lines);
            }
    
            //每秒10帧
            new Timer(100, this).start();
        }
    
        /**
         * @return 随机字符
         */
        private char getChr() {
            return (char) (random.nextInt(94) + 33);
        }
    
        public void actionPerformed(ActionEvent e) {
            graphicsPanel.repaint();
        }
    
        private class GraphicsPanel extends JPanel {
            @Override
            public void paint(Graphics g) {
                Graphics2D g2d = (Graphics2D) g;
                g2d.setFont(getFont().deriveFont(Font.BOLD));
                g2d.setColor(Color.BLACK);
                g2d.fillRect(0, 0, screenSize.width, screenSize.height);
                //当前列
                int currentColumn = 0;
                for (int x = 0; x < screenSize.width; x += gap) {
                    int endPos = posArr[currentColumn];
                    g2d.setColor(Color.CYAN);
                    g2d.drawString(String.valueOf(getChr()), x, endPos * gap);
                    int cg = 0;
                    for (int j = endPos - 15; j < endPos; j++) {
                        //颜色渐变
                        cg += 20;
                        if (cg > 255) {
                            cg = 255;
                        }
                        g2d.setColor(new Color(0, cg, 0));
                        g2d.drawString(String.valueOf(getChr()), x, j * gap);
                    }
                    //每放完一帧，当前列上雨点的位置随机下移1~5行
                    posArr[currentColumn] += random.nextInt(5);
                    //当雨点位置超过屏幕高度时，重新产生一个随机位置
                    if (posArr[currentColumn] * gap > getHeight()) {
                        posArr[currentColumn] = random.nextInt(lines);
                    }
                    currentColumn++;
                }
            }
        }
    
        private class KeyPressListener extends KeyAdapter {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
                    System.exit(0);
                }
            }
        }
    
        public static void main(String[] args) {
            new Rain();
        }
    }

在保存Rain.java文件的目录下打开命令行CMD终端，编译程序：javac Rain.java ，之后只需要执行程序：java Rain，就OK啦，别忘了，退出程序，按ESC键。

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