指定时间执行任务

package test;

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

public class schedule {

    static int count = 0;

    public static void showTimer() {
        TimerTask task = new TimerTask() {
            @Override
            public void run() {
                ++count;
                System.out.println("count执行了-->" + count); // 1次
            }
        };

        Calendar calendar = Calendar.getInstance();
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DAY_OF_MONTH);

        calendar.set(year, month, day, 18, 20, 00);
        Date date = calendar.getTime();
        Timer timer = new Timer();
        timer.schedule(task, date);
    }

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