Java代码雨。黑客帝国（电影）同款代码雨。

待我称王封你为后i 2023-07-22 09:12 3阅读 0赞

package cn.tedu.day03;
    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 static final long serialVersionUID = 1549334578038217282L;
      private Random random = new Random();
      private Dimension screenSize;
      private JPanel graphicsPanel;
      //行高，列宽 @kuimeng
      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 line;
      //列数
      private int columns;
    public Rain(){
        
       initComponents();
       //@kuimeng
      }
      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();
       line = screenSize.height/gap;
       columns = screenSize.width/gap;
       posArr = new int[columns + 7 ];
       random = new Random();
       for(int i = 0;i<posArr.length;i++){
        
        posArr[i] = random.nextInt(line);
       }
       
       //每秒10帧
       
       new Timer(100,this).start();
       }
       private char getChr(){
        
       return (char) (random.nextInt(94)+33);
       
      }
      //@kuimeng
      
      public void actionPerformed(ActionEvent e){
        
       graphicsPanel.repaint();
      }
       
      private class GraphicsPanel extends JPanel{
        
      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;
         //@kuimeng
          }
          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一1-5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(line);
          }
         currentColumn++;
         }}}
         private class KeyPressListener extends KeyAdapter{
        
         public void keyPressed(KeyEvent e){
        
         
         if(e.getKeyCode() == KeyEvent.VK_ESCAPE){
        
          System.exit(0);
          }}}
          public static void main(String[] args){
        
        new Rain();
        }}//@kuimeng

对小编的代码有兴趣的朋友们快快关注我吧~