pipedcommunicationtest.java

疯狂Java讲义_源码(含Java设计模式CHM

import java.io.*;
/**
 * Description:
 * <br/>Copyright (C), 2008-2010, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
class ReaderThread extends Thread
{
	private PipedReader pr;
	//用于包装管道流的BufferReader对象
	private BufferedReader br;
	public ReaderThread(){}
	public ReaderThread(PipedReader pr)
	{
		this.pr = pr;
		this.br = new BufferedReader(pr);
	}
	public void run()
	{
		String buf = null;
		try
		{
			//逐行读取管道输入流中的内容
			while ((buf = br.readLine()) != null)
			{
				System.out.println(buf);
			}
		}
		catch (IOException ex)
		{
			ex.printStackTrace();
		}
		//使用finally块来关闭输入流
		finally
		{
			try
			{
				if (br != null)
				{
					br.close();
				}
			}
			catch (IOException ex)
			{
				ex.printStackTrace();
			}
		}
	}
}
class WriterThread extends Thread
{
	String[] books = new String[]
	{
		"Struts2权威指南",
		"ROR敏捷开发指南",
		"基于J2EE的Ajax宝典",
		"轻量级J2EE企业应用指南"
	};
	private PipedWriter pw;
	public WriterThread(){}
	public WriterThread(PipedWriter pw)
	{
		this.pw = pw;
	}
	public void run()
	{
		try
		{
			//循环100次，向管道输出流中写入100个字符串
			for (int i = 0; i < 100 ; i++)
			{
				pw.write(books[i % 4] + "\n");
			}
		}
		catch (IOException ex)
		{
			ex.printStackTrace();
		}
		//使用finally块来关闭管道输出流
		finally
		{
			try
			{
				if (pw != null)
				{
					pw.close();
				}
			}
			catch (IOException ex)
			{
				ex.printStackTrace();
			}
		}
	}
}

public class PipedCommunicationTest
{
	public static void main(String[] args)
	{
		PipedWriter pw = null;
		PipedReader pr = null;
		try
		{
			//分别创建两个独立的管道输出流、输入流
			pw = new PipedWriter();
			pr = new PipedReader();
			//连接管道输出流、出入流
			pw.connect(pr);

			//将连接好的管道流分别传入2个线程，
			//就可以让两个线程通过管道流进行通信
			new WriterThread(pw).start();
			new ReaderThread(pr).start();
		}
		catch (IOException ex)
		{
			ex.printStackTrace();
		}
	}
}