定时执行任务

package com.hong.jian;

import java.text.SimpleDateFormat;
import java.util.LinkedList;
import java.util.List;

import com.sun.org.apache.xerces.internal.impl.xpath.regex.ParseException;

public class HappyNewYearsDay {
 static class God {
  private static List<String> rememberPromises = new LinkedList<String>();

  /**
   * 上帝愿意承诺 参数值 则返回true
   *
   * @param promise
   * @return
   */
  private static boolean say(String promise) {
   System.out.println(promise);
   rememberPromises.add(promise);
   return true;
  }
 }

 public void receiveFromLiuwh(){
  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
  long start = 0;
  long end = 0;
  try {
   start = sdf.parse("2010-01-01 00:00:00").getTime();
   end = sdf.parse("2011-01-02 00:00:00").getTime();
   if ((start - System.currentTimeMillis()) > 0) {
   
    Thread.sleep(start - System.currentTimeMillis());
   }
  }catch (Exception e) {
   e.printStackTrace();
  }

  while (System.currentTimeMillis() < end) {
   God.say("新年快乐！！万事顺利！");
  }
 }

 public static void main(String[] arts) throws ParseException,InterruptedException, java.text.ParseException {
  HappyNewYearsDay hnyd = new HappyNewYearsDay();
  hnyd.receiveFromLiuwh();

 }
}