(47)使用管道流进行线程间的通信

package com.xuan.thread;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.PipedReader;
import java.io.PipedWriter;

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=br;
	}
	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 e) {
				e.printStackTrace();
		}finally{
			try{
				if(br!=null){
					br.close();
				}
			}catch(IOException e){
				e.printStackTrace();
			}
		}
	}
	
}

class WriterThread extends Thread{
	String[] books=new String[]{"struts2权威","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 e){
			e.printStackTrace();
		}finally{
			try{
				if(pw!=null){
					pw.close();
				}
			}catch(IOException e){
				e.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、输入流
			pw.connect(pr);
			//将连接好的管道流分别传入两个线程就可以让两个线程通过管道进行通信
			new WriterThread(pw).start();
			new ReaderThread(pr).start();
		}catch(IOException e){
			e.printStackTrace();
		}
	}
}