Java学习 - Thread Synchronized （一）

最新推荐文章于 2025-12-27 15:45:53 发布

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本文介绍了一个使用Java实现的生产者-消费者模式的线程同步与共享实例，通过创建生产者和消费者线程，展示了如何在并发环境中进行资源安全地分配和获取。

线程同步与共享

生产 -- 消费者

public class Producer
{
	public static void main(String[] args)
	{
		CubbyHole c = new CubbyHole();
		
		new Pd(c, 1).start();
		new Consumer(c, 1).start();

	}
}	

	class Pd extends Thread
	{
		private CubbyHole cubbyhole;

		private int number;

		public Pd(CubbyHole c, int number)
		{
			cubbyhole = c;
			this.number = number;

		}

		public void run()
		{
			for (int i = 0; i < 10; i++)
			{
				cubbyhole.put(i);
				System.out.println("Producer #" + this.number + " put: " + i);
				try
				{
					sleep((int) (Math.random() * 100));

				}
				catch (InterruptedException e)
				{
				}
			}

		}

	}

	class Consumer extends Thread
	{
		private CubbyHole cubbyhole;

		private int number;

		public Consumer(CubbyHole c, int number)
		{
			cubbyhole = c;
			this.number = number;

		}

		public void run()
		{
			int value = 0;
			for (int i = 0; i < 10; i++)
			{
				value = cubbyhole.get();
				System.out.println("Consumer #" + this.number + " get: " + value);

			}

		}

	}

class CubbyHole
{
	private int seq;

	private boolean available = false;

	public synchronized int get()
	{
		while (available == false)
		{
			try
			{
				wait();

			}
			catch (InterruptedException e)
			{

			}

		}
		available = false;
		notify();
		return seq;
	}

	public synchronized void put(int value)
	{
		while (available == true)
		{
			try
			{
				wait();

			}
			catch (InterruptedException e)
			{
			}
		}
		seq = value;
		available = true;
		notify();
	}

}