thread_线程创建

public class ThreadTest {

    public static void main(String[] args) {
        //创建Thread子类的一个实例并重写run方法
        MyThread myThread = new MyThread();
        myThread.start();

        // 创建一个Thread的匿名子类：
        Thread thread = new Thread() {
            public void run() {
                System.out.println("Thread Running");
            }
        };
        thread.start();
        
        //
         System.out.println(Thread.currentThread().getName());
          for(int i=0; i<10; i++){
             new Thread(" name" + i){
                public void run(){
                 System.out.println("Thread: " + getName() + " running");
                }
             }.start();
          }        
        
    }
}

class MyThread extends Thread {
    public void run() {
        System.out.println("MyThread running");
    }
}

public class RunnableTest {

    public static void main(String[] args) {
        //自定义类实现Runnable接口
        Runnable myRunnable = new Runnable() {
            public void run() {
                System.out.println("myRunnable running ");
            }
        };
        Thread thread1 = new Thread(myRunnable);
        thread1.start();
        
        //匿名
        Thread thread2 = new Thread(
                new Runnable() {
                    public void run() {
                        System.out.println("匿名 Runnable running ");
                    }
                });
        thread2.start();        
    }
}

public class CallableFutureTest {
    public static void main(String[] args) {
        ExecutorService executor = Executors.newCachedThreadPool();
        Task task = new Task();
        Future<Integer> result = executor.submit(task);
        executor.shutdown();

        try {
            Thread.sleep(1000);
        } catch (InterruptedException e1) {
            e1.printStackTrace();
        }

        System.out.println("主线程在执行任务");
        // isDone方法表示任务是否已经完成，若任务完成，则返回true；
        // get()方法用来获取执行结果，这个方法会产生阻塞，会一直等到任务执行完毕才返回；
        // get(long timeout, TimeUnit unit)用来获取执行结果，如果在指定时间内，还没获取到结果，就直接返回null。
        //isCancelled方法表示任务是否被取消成功，如果在任务正常完成前被取消成功，则返回 true。
        try {
            System.out.println("status :" + result.isDone());
            System.out.println("task运行结果" + result.get());
            System.out.println("status :" + result.isDone());
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
        System.out.println("所有任务执行完毕");
    }
}

class Task implements Callable<Integer> {
    @Override
    public Integer call() throws Exception {
        System.out.println("子线程在进行计算");
        Thread.sleep(3000);
        int sum = 0;
        for (int i = 0; i < 100; i++)
            sum += i;
        return sum;
    }
}

public class CallableFutureTaskTest {

    public static void main(String[] args) {
        //第一种方式
        ExecutorService executor = Executors.newCachedThreadPool();
        Task1 task = new Task1();
        FutureTask<Integer> futureTask = new FutureTask<Integer>(task);

        executor.submit(futureTask);
        executor.shutdown();
         
        //第二种方式，注意这种方式和第一种方式效果是类似的，只不过一个使用的是ExecutorService，一个使用的是Thread
        /*Task task = new Task();
        FutureTask<Integer> futureTask = new FutureTask<Integer>(task);
        Thread thread = new Thread(futureTask);
        thread.start();*/
         
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e1) {
            e1.printStackTrace();
        }
         
        System.out.println("主线程在执行任务");
         
        try {
            System.out.println("task运行结果"+futureTask.get());
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
         
        System.out.println("所有任务执行完毕");
    }
}