管道流

一：管道流

管道流的主要作用是可以进行两个线程之间的通信，分为管道输出流和管道输入流，如果要进行管道输出，则必须使用 connect() 把输出流连接在输入流上。

二：范例

package haizhu.com.pipeStream;

import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;

class Send implements Runnable{
	private PipedOutputStream pos = null;
	public Send(){
		this.pos = new PipedOutputStream();
	}
	public void run(){
		String str = "Hello world !";
		try{
			this.pos.write(str.getBytes());
		}catch(Exception e){
			e.printStackTrace();
		}
		try{
			this.pos.close();
		}catch(IOException e){
			e.printStackTrace();
		}
	}
	public PipedOutputStream getPos(){
		return pos;
	}
}
class Receive implements Runnable{
	private PipedInputStream pis = null;
	public Receive(){
		this.pis = new PipedInputStream();
	}
	public void run(){
		byte[] b = new byte[1024];
		int len = 0;
		try{
			len = this.pis.read(b);
		}catch(IOException e){
			e.printStackTrace();
		}
		try{
			this.pis.close();
		}catch(IOException e){
			e.printStackTrace();
		}
		System.out.println("接收的内容是："+new String(b,0,len));
	}
	public PipedInputStream getPis(){
		return pis;
	}
}
public class PipedDemo {
	public static void main(String[] args) {
		Send s = new Send();
		Receive r = new Receive();
		try{
			s.getPos().connect(r.getPis());					// 连接线程
		}catch(IOException e){
			e.printStackTrace();
		}
		new Thread(s).start();								// 启动线程
		new Thread(r).start();
	}
}