一个随机名单抽取器，通过线程来控制，用GUI组件来写的界面，同时用开始和结束按钮来控制名单的抽取，解决了名字不会重复出现的问题-A random list extractor, controlled by the thread, to write with a GUI interface components, while the start and end with a list of buttons to control the extraction, the name will not s