Java 定时器的使用：每天定时执行任务

import java.util.Calendar;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

public class TestTimer {
static int count =0;

public static voidshowTimer() {
TimerTask task = new TimerTask() {
@Override
publicvoid run() {
++count;
System.out.println("时间=" +new Date() + " 执行了" + count + "次"); // 1次
}
};

//设置执行时间
Calendar calendar =Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day =calendar.get(Calendar.DAY_OF_MONTH);//每天
//定制每天的21:09:00执行，
calendar.set(year, month, day, 21, 9, 00);
Date date = calendar.getTime();
Timer timer = new Timer();
System.out.println(date);

int period = 2 * 1000;
//每天的date时刻执行task，每隔2秒重复执行
timer.schedule(task, date, period);
//每天的date时刻执行task, 仅执行一次
//timer.schedule(task, date);
}

public static voidmain(String[] args) {
showTimer();
}
}