Java实现字符雨

15193643451 · 发表于 2014-10-27 17:22

package zfy;

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.util.Random;

import javax.swing.JFrame;

class RainCanvas extends Canvas implements Runnable{
private int width, height;
private Image offScreen; // 缓冲图片
private char[][] charset; // 随机字符集合
private int[] pos; // 列的起始位置
private Color[] colors = new Color[30]; // 列的渐变颜色
public RainCanvas(int width, int height) {
         this.width = width;
         this.height = height;
         // 生成ASCII可见字符集合
         Random rand = new Random();
         charset = new char[width / 10][height / 10];
         for (int i = 0; i < charset.length; i++) {
                  for (int j = 0; j < charset.length; j++) {
                        charset[j] = (char) (rand.nextInt(96) + 48);
                  }
         }
         // 随机化列起始位置
         pos = new int[charset.length];
         for (int i = 0; i < pos.length; i++) {
                  pos = rand.nextInt(pos.length);
         }
         // 生成从黑色到绿色的渐变颜色，最后一个保持为白色
         for (int i = 0; i < colors.length - 1; i++) {
                  colors = new Color(0, 255 / colors.length * (i + 1), 0);
         }
         colors[colors.length - 1] = new Color(255, 255, 255);
         setBackground(Color.BLACK);
         setSize(width, height);
         setVisible(true);
}

public void startRain() {
         new Thread(this).start();
}
public void drawRain() {
         if (offScreen == null) {
                  return;
         }
         Random rand = new Random();
         Graphics g = offScreen.getGraphics();
         g.clearRect(0, 0, width, height);
         g.setFont(new Font("Arial", Font.PLAIN, 14));
         //
         for (int i = 0; i < charset.length; i++) {
                  int speed = rand.nextInt(3);
                  for (int j = 0; j < colors.length; j++) {
                        int index = (pos + j) % charset.length;
                        g.setColor(colors[j]);
                        g.drawChars(charset, index, 1, i * 10, index * 10);
                  }
                  pos = (pos + 1) % charset.length;
         }
}
@Override
public void update(Graphics g) {
         paint(g);
}
public void run() {
         while (true) {
                  drawRain();
                  repaint();
                  try {
                        Thread.sleep(50); // 可改变睡眠时间以调节速度
                  }
                  catch (InterruptedException e) {
                        System.out.println(e);
                  }
         }
}
@Override
public void paint(Graphics g) {
         // 当组件显示时检测是否要创建缓冲图片，在组件还不可见时调用createImage将返回null
         if (offScreen == null) {
                  offScreen = createImage(width, height);
         }
         g.drawImage(offScreen, 0, 0, this);
}
}

public class ZFYTest extends JFrame{

      private RainCanvas canvas = new RainCanvas(1366, 768);

      public ZFYTest() {
            super("ZFY");
            setUndecorated(true);
      setExtendedState(JFrame.MAXIMIZED_BOTH);
      setVisible(true);
      canvas = new RainCanvas(this.getWidth(), this.getHeight());
      //canvas = new RainCanvas(800,600);
      getContentPane().add(canvas);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      }

      public static void main(String[] args) {

            ZFYTest test = new ZFYTest();
            test.canvas.startRain();

      }

}

羽小时 · 发表于 2014-10-27 17:42

问个脑残的问题。。。这个怎么用

刺蝴蝶De箫启灵 · 发表于 2014-10-27 17:47

这里玩java的比较少。。你会失望的

WuAiFenXiang · 发表于 2014-10-27 17:56

问大神一个问题。。。这个怎么用

Mr.K · 发表于 2014-10-28 17:45

无语无法加载主类

manbajie · 发表于 2014-10-28 23:01

看看怎么做到的

十一月的红薯 · 发表于 2014-11-25 19:28

{:1_902:}，收藏，试一下

morigin · 发表于 2014-11-25 21:14

不错学习了!~ java菜鸟路过,,,,膜拜

dtsygz · 发表于 2014-11-25 21:24

java菜鸟路过

w596761132 · 发表于 2014-11-25 22:30

没看懂啊呵呵

帐号		自动登录	找回密码
密码			注册[Register]

[Java 转载] Java实现字符雨