转载一个简单的粒子效果实现，便于学习粒子系统也可直接使用到自己的程序中。作者在他网站上做了个例子程序 http://www.jhlabs.com/java/particles.html-a simple particle system

This program can draw any polygon that is a "regular polygon", a "star polygon" or a "star figure". The code for the program is very simple and straight forward and the results are pretty cool! It is definitly pretty good for the eyes! For more infor