public static class Mythread extends Thread{
        @Override
        public void run() {
            System.out.println("當(dāng)前線程"+Thread.currentThread().getId());
            int i = 10/2;
            System.out.println("運(yùn)行結(jié)果"+i);
        }
    }
//調(diào)用線程。
public static void main(String[] args) throws ExecutionException, InterruptedException {
        /**thread執(zhí)行方式*/
        Mythread mythread = new Mythread();
        mythread.start();//啟動(dòng)線程
        System.out.println("main--end");
}

public static class MyRunable implements Runnable {

    @Override
    public void run() {
        System.out.println("當(dāng)前線程"+Thread.currentThread().getId());
        int i = 10/2;
        System.out.println("運(yùn)行結(jié)果"+i);

    }
}

/**
 * runable的啟動(dòng)方式
 */

MyRunable runable = new MyRunable();
new Thread(runable).start();
System.out.println("main--end");

/**
 * Callable可以允許有返回值
 */

public static class Callale01 implements Callable<Integer> {

    @Override
    public Integer call() throws Exception {
        System.out.println("當(dāng)前線程"+Thread.currentThread().getId());
        int i = 10/2;
        System.out.println("運(yùn)行結(jié)果"+i);
        return i;
    }
}

/**
 * callale的啟動(dòng)方式
 */
FutureTask<Integer> futureTask =new FutureTask<>(new Callale01());
//取返回結(jié)果。
Integer i = futureTask.get();
new Thread(futureTask).start();
System.out.println("返回結(jié)果是："+i);

/**
 * 七大參數(shù)
 * corePoolSize： 1.核心線程數(shù)[一直存在]: 線程池創(chuàng)建好了以后。就準(zhǔn)備就緒的線程數(shù)量。
 * maxinumPoolSize: 2 最大線程數(shù)量
 * keepaliveTime: 存活時(shí)間。空閑線程的最大的等待時(shí)間。
 * unit  等待時(shí)間的單位
 * blockingQueue 阻塞隊(duì)列。如果任務(wù)很多就會(huì)放在隊(duì)列里面，只要有線程空閑了，就會(huì)去隊(duì)列里面去取。
 * threadFactory :線程的工廠。
 * RejectExecutionHandler :如果隊(duì)列滿了。按照我們指定的策略。拒絕執(zhí)行任務(wù)。
 *
 */
 ThreadPoolExecutor executor = new ThreadPoolExecutor(5,100,10,TimeUnit.SECONDS,
          new LinkedBlockingQueue<>(100),
                                                    Executors.defaultThreadFactory(),new ThreadPoolExecutor.AbortPolicy());

Executors.newCachedThreadPool();

Executors.newSingleThreadExecutor();