通过制作烟花的实例，运用了Java2中的界面技术和线程技术。通过界面技术，制作出烟花的形状。通过线程技术，控制烟花的播放场景和播放时间。-Instance through the production of fireworks, the use of the the Java2 interface and thread. Interface technology, making the shape of the fireworks. By threading technology, contro