package com.thread.test.thread;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.*;
import java.util.concurrent.locks.ReentrantLock; /**
* schedule(Runnable command, long delay, TimeUnit unit)
* @ command: 需要执行的任务
* @ delay:任务执行需要延迟的时间
* @ unit:时间单位
*
* 一次性执行任务,执行完成结束
*
* ScheduledExecutorService:
* scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit)
* @ Runnable command: 需要执行的任务
* @ long initialDelay:第一次执行延迟的时间
* @ long period:间隔周期
* @ TimeUnit unit
*
* 包含首次延迟的周期性执行任务,第一次执行:delay+period,第二次:delay+2*period,以此类推...
* 停止:异常停止执行,主动调用停止方法
* 如果某一个周期执行时间超过设定的period,则后续顺延
*
* scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit)
* @ command: 需要执行的任务
* @ initialDelay:第一次执行延迟的时间
* @ delay:周期之间的延迟,间隔
* @ unit:前两个参数的单位
*
* 周期性执行任务:第一次执行:initialDelay+delay,第二次:initialDelay+2*delay,以此类推...
* 停止:异常停止执行,主动调用停止方法
* 不顺延
*
* Created by windwant on 2016/5/26.
*/
public class MyExecutor {
public static void main(String[] args) {
testTimer();
} public static void testTimer(){
new Timer().schedule(new MyTimerTask(), 2000, 5000);
} public static void testExecutors(){
MyERunnable mer = new MyERunnable(5);
// ExecutorService es = Executors.newCachedThreadPool();
// ExecutorService es = Executors.newFixedThreadPool(2);
ScheduledExecutorService es = Executors.newScheduledThreadPool(2);
es.schedule(mer, 10000, TimeUnit.SECONDS.MILLISECONDS);
es.scheduleAtFixedRate(mer, 2, 10, TimeUnit.SECONDS);
es.scheduleWithFixedDelay(mer, 1, 5, TimeUnit.SECONDS);
es.shutdown();
}
} class MyERunnable implements Runnable{
private int num = 0;
MyERunnable(int num){
this.num = num;
}
public void run() {
ReentrantLock lock = new ReentrantLock();
try{
lock.lock();
for (int i = 0; i < num; i++) {
System.out.println("current thread: " + Thread.currentThread().getName() + " num--" + i);
Thread.sleep(1000);
}
}catch (Exception e){
e.printStackTrace();
}finally {
lock.unlock();
}
}
} class MyTimerTask extends TimerTask{ @Override
public void run() {
System.out.println("timer task");
}
}

项目地址:https://github.com/windwant/windwant-demo/tree/master/thread-demo

04-13 11:13