import lombok.SneakyThrows;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
/**
* @author layman
*/
public class Demo02 {
public static void main(String[] args) {
Runnable runnable = new Demo02Runnable();
//缓存线程池
//ExecutorService es = Executors.newCachedThreadPool();
//创建固定容量为2的线程池,轮流执行
//ExecutorService es = Executors.newFixedThreadPool(2);
//创建单一线程池,串行执行
// ExecutorService es = Executors.newSingleThreadExecutor();
// for (int i = 0; i < 10; i++) {
// es.execute(runnable);
// }
//线程池中保留2个线程,即便它们是空闲的
//ScheduledExecutorService es = Executors.newScheduledThreadPool(2);
ScheduledExecutorService es = Executors.newSingleThreadScheduledExecutor();
System.out.println("准备执行时间: " + System.currentTimeMillis());
//延迟3秒执行
es.schedule(runnable,3, TimeUnit.SECONDS);
/**
* runnable:执行的线程
* initialDelay:初始化执行需要延迟的时间
* period:每次执行的间隔
* unit:时间单位
*/
//es.scheduleAtFixedRate(runnable,3,4,TimeUnit.SECONDS);
//关闭线程池
//es.shutdown();
}
}
class Demo02Runnable implements Runnable{
private SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd HH:mm:ss");
private static long waitTime = 1000L;
@SneakyThrows
@Override
public void run() {
System.out.println(Thread.currentThread().getName()+" 开始于:"+sdf.format(new Date(System.currentTimeMillis())));
//System.out.println(Thread.currentThread().getName()+" 开始于:"+System.currentTimeMillis());
synchronized (this){
waitTime += 100L;
}
Thread.sleep(waitTime);
//System.out.println(Thread.currentThread().getName()+" 结束于:"+System.currentTimeMillis());
System.out.println(Thread.currentThread().getName()+" 结束于:"+sdf.format(new Date(System.currentTimeMillis())));
}
}