Java 根据文件中定义的时间执行信息提醒，java定义,import java.

Java 根据文件中定义的时间执行信息提醒，java定义,import java.

import java.io.*;import java.text.*;import java.util.*;import javax.swing.JOptionPane;/** * Read a file of reminders, run each when due using java.util.Timer * @author Ian F. Darwin, <a href="http://www.darwinsys.com/">http://www.darwinsys.com/ * @version $Id: ReminderService.java,v 1.7 2004/02/09 03:33:46 ian Exp $ */public class ReminderService {   /** The Timer object */   Timer timer = new Timer();   class Item extends TimerTask {      String message;      Item(String m) {         message = m;      }      public void run() {         message(message);      }   }   public static void main(String[] argv) throws IOException {      new ReminderService().load();   }   protected void load() throws IOException {      BufferedReader is = new BufferedReader(         new FileReader("ReminderService.txt"));      SimpleDateFormat formatter =         new SimpleDateFormat ("yyyy MM dd hh mm");      String aLine;      while ((aLine = is.readLine()) != null) {         ParsePosition pp = new ParsePosition(0);         Date date = formatter.parse(aLine, pp);         if (date == null) {            message("Invalid date in " + aLine);            continue;         }         String mesg = aLine.substring(pp.getIndex());         timer.schedule(new Item(mesg), date);      }   }   /** Display a message on the console and in the GUI.    * Used both by Item tasks and by mainline parser.    */   void message(String message) {      System.out.println("\\007" + message);      JOptionPane.showMessageDialog(null,         message,         "Timer Alert",            // titlebar         JOptionPane.INFORMATION_MESSAGE);   // icon   }}//该片段来自于http://byrx.net