java中timer的schedule和scheduleAtFixedRate方法区别详解

package day01;import java.text.SimpleDateFormat;import java.util.Timer;import java.util.TimerTask;public class Test01 {  public static void main(String[] args) {    final Timer timer = new Timer();    //timer.scheduleAtFixedRate(new TimerTask() {    timer.schedule(new TimerTask() {//分别注释这行和上面这行试一试效果      int count = 1;      @Override      public void run() {        count++;        if (count == 10) {          try {            Thread.sleep(5000);          } catch (InterruptedException e) {            System.out.println("延迟5s");            e.printStackTrace();          }        }        SimpleDateFormat sf = new SimpleDateFormat(            "yyyy MM dd hh:mm:ss");        System.out.println("当前时间："            + sf.format(System.currentTimeMillis()) + "计划时间："            + sf.format(scheduledExecutionTime()));      }    }, 1000, 1000);  }}