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 fire