本代码制作烟花。执行本例实例后，用鼠标点击浏览器中的面板，将出现五彩缤纷的烟花效果。本实例的知识点有：鼠标事件的监听，Graphics类和Thread类的应用。-The code produced fireworks. Examples of the implementation of the present cases, the use of mouse clicks in the browser panel, there will be the effect of colorful fireworks. Knowledge point of this example are as follows: mouse event monitor, Graphics category and the application of Thread class.