Java 定時執行函數

public class sendAutoServer extends HttpServlet{private static final long serialVersionUID = 8398634860666661954L;// private static Logger logger = Logger.getLogger(CLS_Business_Ms.class); public void init(ServletConfig cfg) throws ServletException {         super.init(cfg);                   sendAutoThread sthread = new sendAutoThread();         sthread.start();         //ReceiveServer server =new ReceiveServer();       }  }public class sendAutoThread extends Thread { boolean isrun = true; public void run(){  while(isrun){//do something; } }}