纯Java代码实现流星划过天空

废话不多说了，直接给大家贴java代码了。

import java.awt.color;
  import java.awt.graphics;
  import java.awt.image.bufferedimage;
  import javax.swing.jframe;
  import javax.swing.jpanel;
  public class meteorfly extends jframe {
   final int max = ; // (~)流星的个数
   final int sleep = ; // 流星飞行的速度（数值越大，速度越慢）
   final int colorlv = ; // (~)色阶（可改变光晕大小）
   final string color = null; // ("#"~"#ffffff")光晕颜色（如果不填或null，则为默认颜色）
   final int size = ; // (~)流星大小
   private mypanel panel;
   public meteorfly() {
   panel = new mypanel();
   this.getcontentpane().add(panel);
   this.setsize(, ); // 创建窗体
   this.setdefaultcloseoperation(jframe.exit_on_close);
   this.setvisible(true);
   }
   public static void main(string[] args) {
   new meteorfly();
   }
   class mypanel extends jpanel implements runnable {
   meteor p[];
   int appletwidth, appletheight;
   bufferedimage offscreen;
   graphics drawoffscreen;
   thread pthread;
   public mypanel() {
     setbackground(color.black); //窗体初始化
     appletwidth = ;
     appletheight = ;
     p = new meteor[max];
     for (int i = ; i < max; i++)
     p[i] = new meteor();
     offscreen = new bufferedimage(appletwidth, appletheight,
       bufferedimage.type_int_bgr);
     drawoffscreen = offscreen.getgraphics();
     pthread = new thread(this);
     pthread.start();
   }
   @override
   public void paintcomponent(graphics g) {
     // todo auto-generated method stub
     super.paintcomponents(g);
     g.drawimage(offscreen, , , this);
   }
   @override
   final public void run() {
     while (true) {
     // drawoffscreen.clearrect(, , appletwidth, appletheight); //
     // 清屏
     for (int i = ; i < max; i++) {
       drawoffscreen.setcolor(p[i].color); // rgb颜色
       drawoffscreen.filloval(p[i].x, p[i].y, size, size);
       p[i].x += p[i].mx;
       p[i].y += p[i].my;
       // if (p[i].x > appletwidth || p[i].y > appletheight) {
       // p[i].reset();
       // }
       int x = p[i].x;
       int y = p[i].y;
       int r = p[i].color.getred(); // 提取颜色
       int g = p[i].color.getgreen();
       int b = p[i].color.getblue();
       while (true) {
       if (r == && g == && b == ) {
         break;
       }
       r -= colorlv; // 尾部颜色淡化
       if (r < ) {
         r = ;
       }
       g -= colorlv;
       if (g < ) {
         g = ;
       }
       b -= colorlv;
       if (b < ) {
         b = ;
       }
       color color = new color(r, g, b);
       x -= p[i].mx; // 覆盖尾部
       y -= p[i].my;
       drawoffscreen.setcolor(color);
       drawoffscreen.filloval(x, y, size, size);
       }
       if (x > appletwidth || y > appletheight) { // 流星飞出窗口，重置流星
       p[i].reset();
       }
     }
     repaint();
     try {
       thread.sleep(sleep);
     } catch (interruptedexception e) {
       // todo auto-generated catch block
       e.printstacktrace();
     }
     }
   }
   }
   class meteor { // 流星类
   int x, y; // 流星的位置
   int mx, my; // 下落速度
   color color; // 流星颜色
   public meteor() {
     reset();
   }
   public void reset() {
     int rand = (int) (math.random() * ); //随机生成流星出现位置
     if (rand > ) {
     x = (int) (math.random() * );
     y = ;
     } else {
     y = (int) (math.random() * );
     x = ;
     }
     mx = (int) (math.random() * + ); //随机生成下落速度和角度
     my = (int) (math.random() * + );
     if (color == null || color.length() == ) {
     color = new color(
       // 随机颜色
       (new double(math.random() * )).intvalue() + ,
       (new double(math.random() * )).intvalue() + ,
       (new double(math.random() * )).intvalue() + );
     } else {
     color = color.decode(color);
     }
   }
   }
 }

以上代码就是本文给大家讲述的纯java代码实现流星划过天空，希望本文分享能够给大家带来意想不到的收获。