class CreateThread extends Thread {
	// run方法中编写 多线程需要执行的代码
	public void run() {
		for (inti = 0; i< 10; i++) {
			System.out.println("i:" + i);
		}
	}
}
publicclass ThreadDemo {

	publicstaticvoid main(String[] args) {
		System.out.println("-----多线程创建开始-----");
		// 1.创建一个线程
		CreateThread createThread = new CreateThread();
		// 2.开始执行线程 注意 开启线程不是调用run方法，而是start方法
		System.out.println("-----多线程创建启动-----");
		createThread.start();
		System.out.println("-----多线程创建结束-----");
	}

}

class CreateRunnable implements Runnable {

	@Override
	publicvoid run() {
		for (inti = 0; i< 10; i++) {
			System.out.println("i:" + i);
		}
	}

}

publicclass ThreadDemo2 {
	publicstaticvoid main(String[] args) {
		System.out.println("-----多线程创建开始-----");
		// 1.创建一个线程
		CreateRunnable createThread = new CreateRunnable();
		// 2.开始执行线程 注意 开启线程不是调用run方法，而是start方法
		System.out.println("-----多线程创建启动-----");
		Thread thread = new Thread(createThread);
		thread.start();
		System.out.println("-----多线程创建结束-----");
	}
}

	 System.out.println("-----多线程创建开始-----");
		 Thread thread = new Thread(new Runnable() {
			public void run() {
				for (int i = 0; i< 10; i++) {
					System.out.println("i:" + i);
				}
			}
		});
		 thread.start();
		 System.out.println("-----多线程创建结束-----");

class ThreadTrain6 implements Runnable {
	// 这是货票总票数,多个线程会同时共享资源
	private int trainCount = 100;
	public boolean flag = true;
	private Object mutex = new Object();

	@Override
	public void run() {
		if (flag) {
			while (true) {
				synchronized (mutex) {
					// 锁(同步代码块)在什么时候释放？ 代码执行完， 自动释放锁.
					// 如果flag为true 先拿到 obj锁,在拿到this 锁、 才能执行。
					// 如果flag为false先拿到this,在拿到obj锁，才能执行。
					// 死锁解决办法:不要在同步中嵌套同步。
					sale();
				}
			}
		} else {
			while (true) {
				sale();
			}
		}
	}

	public synchronized void sale() {
		synchronized (mutex) {
			if (trainCount > 0) {
				try {
					Thread.sleep(40);
				} catch (Exception e) {

				}
				System.out.println(Thread.currentThread().getName() + ",出售 第" + (100 - trainCount + 1) + "张票.");
				trainCount--;
			}
		}
	}
}

public class DeadlockThread {

	public static void main(String[] args) throws InterruptedException {

		ThreadTrain6 threadTrain = new ThreadTrain6(); // 定义 一个实例
		Thread thread1 = new Thread(threadTrain, "一号窗口");
		Thread thread2 = new Thread(threadTrain, "二号窗口");
		thread1.start();
		Thread.sleep(40);
		threadTrain.flag = false;
		thread2.start();
	}

}

class ThreadVolatileDemo extends Thread {
	public boolean flag = true;
	@Override
	public void run() {
		System.out.println("开始执行子线程....");
		while (flag) {
		}
		System.out.println("线程停止");
	}
	public void setRuning(boolean flag) {
		this.flag = flag;
	}

}

public class ThreadVolatile {
	public static void main(String[] args) throws InterruptedException {
		ThreadVolatileDemo threadVolatileDemo = new ThreadVolatileDemo();
		threadVolatileDemo.start();
		Thread.sleep(3000);
		threadVolatileDemo.setRuning(false);
		System.out.println("flag 已经设置成false");
		Thread.sleep(1000);
		System.out.println(threadVolatileDemo.flag);
		//不停顿就没关系
	}
}

Lock lock  = new ReentrantLock();
lock.lock();
try{
//可能会出现线程安全的操作
}finally{
//一定在finally中释放锁
//也不能把获取锁在try中进行，因为有可能在获取锁的时候抛出异常
  lock.ublock();
}

class Res {
	// 生成序列号共享变量
	public static Integer count = 0;
	public static ThreadLocal<Integer> threadLocal = new ThreadLocal<Integer>() {
		protected Integer initialValue() {

			return 0;
		};

	};

	public Integer getNum() {
		int count = threadLocal.get() + 1;
		threadLocal.set(count);
		return count;
	}
}

public class ThreadLocaDemo2 extends Thread {
	private Res res;

	public ThreadLocaDemo2(Res res) {
		this.res = res;
	}

	@Override
	public void run() {
		for (int i = 0; i < 3; i++) {
			System.out.println(Thread.currentThread().getName() + "---" + "i---" + i + "--num:" + res.getNum());
		}

	}

	public static void main(String[] args) {
		Res res = new Res();
		ThreadLocaDemo2 threadLocaDemo1 = new ThreadLocaDemo2(res);
		ThreadLocaDemo2 threadLocaDemo2 = new ThreadLocaDemo2(res);
		ThreadLocaDemo2 threadLocaDemo3 = new ThreadLocaDemo2(res);
		threadLocaDemo1.start();
		threadLocaDemo2.start();
		threadLocaDemo3.start();
	}

}

public class Test002 {

	public static void main(String[] args) throws InterruptedException {
		System.out.println("等待子线程执行完毕...");
		CountDownLatch countDownLatch = new CountDownLatch(2);
		new Thread(new Runnable() {

			@Override
			public void run() {
				System.out.println("子线程," + Thread.currentThread().getName() + "开始执行...");
				countDownLatch.countDown();// 每次减去1
				System.out.println("子线程," + Thread.currentThread().getName() + "结束执行...");
			}
		}).start();
		new Thread(new Runnable() {

			@Override
			public void run() {
				System.out.println("子线程," + Thread.currentThread().getName() + "开始执行...");
				countDownLatch.countDown();
				System.out.println("子线程," + Thread.currentThread().getName() + "结束执行...");
			}
		}).start();

		countDownLatch.await();// 调用当前方法主线程阻塞  countDown结果为0, 阻塞变为运行状态
		System.out.println("两个子线程执行完毕....");
		System.out.println("继续主线程执行..");
	}

}

class Writer extends Thread {
	private CyclicBarrier cyclicBarrier;
	public Writer(CyclicBarrier cyclicBarrier){
		 this.cyclicBarrier=cyclicBarrier;
	}
	@Override
	public void run() {
		System.out.println("线程" + Thread.currentThread().getName() + ",正在写入数据");
		try {
			Thread.sleep(3000);
		} catch (Exception e) {
			// TODO: handle exception
		}
		System.out.println("线程" + Thread.currentThread().getName() + ",写入数据成功.....");

		try {
			cyclicBarrier.await();//在这之前的所有动作执行完了在执行后面
		} catch (Exception e) {
		}
		System.out.println("所有线程执行完毕..........");
	}

}

public class Test001 {

	public static void main(String[] args) {
		CyclicBarrier cyclicBarrier=new CyclicBarrier(5);
		for (int i = 0; i < 5; i++) {
			Writer writer = new Writer(cyclicBarrier);
			writer.start();
		}
	}

}

class Parent implements Runnable {
	private String name;
	private Semaphore wc;
	public Parent(String name,Semaphore wc){
		this.name=name;
		this.wc=wc;
	}
	@Override
	public void run() {
		try {
			// 剩下的资源(剩下的茅坑)
			int availablePermits = wc.availablePermits();
			if (availablePermits > 0) {
				System.out.println(name+"天助我也,终于有茅坑了...");
			} else {
				System.out.println(name+"怎么没有茅坑了...");
			}
			//申请茅坑 如果资源达到3次，就等待
			wc.acquire();
			System.out.println(name+"终于轮我上厕所了..爽啊");
			   Thread.sleep(new Random().nextInt(1000)); // 模拟上厕所时间。
			System.out.println(name+"厕所上完了...");
			wc.release();

		} catch (Exception e) {

		}
	}
}
public class TestSemaphore02 {
	public static void main(String[] args) {
		// 一个厕所只有3个坑位，但是有10个人来上厕所，那怎么办？假设10的人的编号分别为1-10，并且1号先到厕所，10号最后到厕所。那么1-3号来的时候必然有可用坑位，顺利如厕，4号来的时候需要看看前面3人是否有人出来了，如果有人出来，进去，否则等待。同样的道理，4-10号也需要等待正在上厕所的人出来后才能进去，并且谁先进去这得看等待的人是否有素质，是否能遵守先来先上的规则。
         Semaphore semaphore = new Semaphore(3);
		for (int i = 1; i <=10; i++) {
			 Parent parent = new Parent("第"+i+"个人,",semaphore);
			 new Thread(parent).start();
		}
	}
}

	ArrayBlockingQueue<String> arrays = new ArrayBlockingQueue<String>(3);
	arrays.add("李四");
	 arrays.add("张军");
	arrays.add("张军");
	// 添加阻塞队列
	arrays.offer("张三", 1, TimeUnit.SECONDS);

class ProducerThread implements Runnable {
	private BlockingQueue queue;
	private volatile boolean flag = true;
	private static AtomicInteger count = new AtomicInteger();
	public ProducerThread(BlockingQueue queue) {
		this.queue = queue;
	}

	@Override
	public void run() {
		try {
			System.out.println("生产线程启动...");
			while (flag) {
				System.out.println("正在生产数据....");
				String data = count.incrementAndGet()+"";
				// 将数据存入队列中
				boolean offer = queue.offer(data, 2, TimeUnit.SECONDS);
				if (offer) {
					System.out.println("生产者,存入" + data + "到队列中,成功.");
				} else {
					System.out.println("生产者,存入" + data + "到队列中,失败.");
				}
				Thread.sleep(1000);
			}
		} catch (Exception e) {

		} finally {
			System.out.println("生产者退出线程");
		}

	}

	public void stop() {
		this.flag = false;
	}
}

class ConsumerThread implements Runnable {
	private BlockingQueue<String> queue;
	private volatile boolean flag = true;

	public ConsumerThread(BlockingQueue<String> queue) {
		this.queue = queue;

	}

	@Override
	public void run() {
		System.out.println("消费线程启动...");
		try {
			while (flag) {
				System.out.println("消费者,正在从队列中获取数据..");
				String data = queue.poll(2, TimeUnit.SECONDS);
				if (data != null) {
					System.out.println("消费者,拿到队列中的数据data:" + data);
					Thread.sleep(1000);
				} else {
					System.out.println("消费者,超过2秒未获取到数据..");
					flag = false;
				}


			}
		} catch (Exception e) {
               e.printStackTrace();
		} finally {
			System.out.println("消费者退出线程...");
		}

	}

}

public class ProducerAndConsumer {
	public static void main(String[] args) throws InterruptedException {
		BlockingQueue<String> queue = new LinkedBlockingQueue<String>(10);
		ProducerThread producerThread1 = new ProducerThread(queue);
		ProducerThread producerThread2 = new ProducerThread(queue);
		ConsumerThread consumerThread1 = new ConsumerThread(queue);
        Thread t1 = new Thread(producerThread1);
        Thread t2 = new Thread(producerThread2);
        Thread c1 = new Thread(consumerThread1);
        t1.start();
        t2.start();
        c1.start();

        // 执行10s
        Thread.sleep(10 * 1000);
        producerThread1.stop();
        producerThread2.stop();

	}
}

		// 无限大小线程池 jvm自动回收
		ExecutorService newCachedThreadPool = Executors.newCachedThreadPool();
		for (int i = 0; i < 10; i++) {
			final int temp = i;
			newCachedThreadPool.execute(new Runnable() {

				@Override
				public void run() {
					try {
						Thread.sleep(100);
					} catch (Exception e) {
						// TODO: handle exception
					}
			System.out.println(Thread.currentThread().getName() + ",i:" + temp);
				}
			});
		}

ScheduledExecutorService newScheduledThreadPool = Executors.newScheduledThreadPool(5);
		for (int i = 0; i < 10; i++) {
			final int temp = i;
			newScheduledThreadPool.schedule(new Runnable() {
				public void run() {
					System.out.println("i:" + temp);
				}
			}, 3, TimeUnit.SECONDS);//表示延迟3秒执行。
}

	ExecutorService newSingleThreadExecutor = Executors.newSingleThreadExecutor();
		for (int i = 0; i < 10; i++) {
			final int index = i;
			newSingleThreadExecutor.execute(new Runnable() {

				@Override
				public void run() {
					System.out.println("index:" + index);
					try {
						Thread.sleep(200);
					} catch (Exception e) {
						// TODO: handle exception
					}
				}
			});//注意: 结果依次输出，相当于顺序执行各个任务。
		}

public class Test implements Runnable {
	public  synchronized void get() {
		System.out.println("name:" + Thread.currentThread().getName() + " get();");
		set();
	}

	public synchronized  void set() {
		System.out.println("name:" + Thread.currentThread().getName() + " set();");
	}

	@Override

	public void run() {
		get();
	}

	public static void main(String[] args) {
		Test ss = new Test();
		new Thread(ss).start();
		new Thread(ss).start();
		new Thread(ss).start();
		new Thread(ss).start();
	}
}

public class Test02 extends Thread {
	ReentrantLock lock = new ReentrantLock();
	public void get() {
		lock.lock();
		System.out.println(Thread.currentThread().getId());
		set();
		lock.unlock();
	}
	public void set() {
		lock.lock();
		System.out.println(Thread.currentThread().getId());
		lock.unlock();
	}
	@Override
	public void run() {
		get();
	}
	public static void main(String[] args) {
		Test ss = new Test();
		new Thread(ss).start();
		new Thread(ss).start();
		new Thread(ss).start();
	}

}

public class Cache {
	static Map<String, Object> map = new HashMap<String, Object>();
	static ReentrantReadWriteLock rwl = new ReentrantReadWriteLock();
	static Lock r = rwl.readLock();
	static Lock w = rwl.writeLock();

	// 获取一个key对应的value
	public static final Object get(String key) {
		r.lock();
		try {
			System.out.println("正在做读的操作,key:" + key + " 开始");
			Thread.sleep(100);
			Object object = map.get(key);
			System.out.println("正在做读的操作,key:" + key + " 结束");
			System.out.println();
			return object;
		} catch (InterruptedException e) {

		} finally {
			r.unlock();
		}
		return key;
	}

	// 设置key对应的value，并返回旧有的value
	public static final Object put(String key, Object value) {
		w.lock();
		try {

			System.out.println("正在做写的操作,key:" + key + ",value:" + value + "开始.");
			Thread.sleep(100);
			Object object = map.put(key, value);
			System.out.println("正在做写的操作,key:" + key + ",value:" + value + "结束.");
			System.out.println();
			return object;
		} catch (InterruptedException e) {

		} finally {
			w.unlock();
		}
		return value;
	}

	// 清空所有的内容
	public static final void clear() {
		w.lock();
		try {
			map.clear();
		} finally {
			w.unlock();
		}
	}

	public static void main(String[] args) {
		new Thread(new Runnable() {

			@Override
			public void run() {
				for (int i = 0; i < 10; i++) {
					Cache.put(i + "", i + "");
				}

			}
		}).start();
		new Thread(new Runnable() {

			@Override
			public void run() {
				for (int i = 0; i < 10; i++) {
					Cache.get(i + "");
				}
			}
		}).start();
	}
}

	private AtomicReference<Thread> sign =new AtomicReference<>();
	public void lock() {
		Thread current = Thread.currentThread();
		while (!sign.compareAndSet(null, current)) {
          }
	}
	public void unlock() {
		Thread current = Thread.currentThread();
		sign.compareAndSet(current, null);
	}

public class Test implements Runnable {
	static int sum;
	private SpinLock lock;

	public Test(SpinLock lock) {
		this.lock = lock;
	}

	/**
	 * @param args
	 * @throws InterruptedException
	 */
	public static void main(String[] args) throws InterruptedException {
		SpinLock lock = new SpinLock();
		for (int i = 0; i < 100; i++) {
			Test test = new Test(lock);
			Thread t = new Thread(test);
			t.start();
		}

		Thread.currentThread().sleep(1000);
		System.out.println(sum);
	}

	@Override
	public void run() {
		this.lock.lock();
		this.lock.lock();
		sum++;
		this.lock.unlock();
		this.lock.unlock();
	}

}