写一个JAVA程序在指定的时间自动运行:如每天零晨开始运行.(100分)

import java.util.*;
public class MyTest extends Thread {
	Timer timer;
	int defaultHour;//开始时钟(小时)
	int defaultMin;//开始分钟(分钟)
	int defaultInterval;
//时间间隔(分钟)
	Date date;//开始时间
	Calendar curCalendar;
	Calendar calendar;//
	public MyTest() {
		defaultHour = 0;
		defaultMin = 0;
		defaultInterval = 24*60;
		curCalendar = Calendar.getInstance();
		calendar = Calendar.getInstance();
		calendar.set(Calendar.HOUR_OF_DAY, defaultHour);
		calendar.set(Calendar.MINUTE, defaultMin);
		while (calendar.before(curCalendar)) {
			calendar.add(Calendar.MINUTE, defaultInterval);
			System.out.println(calendar.getTime().toString());
		}
		date = calendar.getTime();
		timer = new Timer();
	}
	public void run() {
		System.out.println("=========");
		System.out.println(curCalendar.getTime().toString() + " schedule started.");
		System.out.println(date.toString() + " first schedule start.");
		System.out.println("=========");
		timer.schedule(new InterfaceTask(), date, defaultInterval * 60 * 1000);
	}
	public static void main(String[] args) {
		try{
			new MyTest().start();
		}catch (Exception e) {
			e.printStackTrace();
		}
		
	}
	class InterfaceTask extends TimerTask {
		public void run() {
			System.out.println("=========");
			System.out.println(Calendar.getInstance().getTime().toString() + " scheduledo
ing start!");
			try { 
				//TODO:
				System.out.println("done");
			} catch (Exception e) {
				e.printStackTrace();
			}
			System.out.println(Calendar.getInstance().getTime().toString() + " scheduledo
ing end!");
			System.out.println("=========");
		}
	}
}