管道通信原理

PipedInputStream類與PipedOutputStream類用於在應用程序中創建管道通信.一個PipedInputStream實例對 象必須和一個PipedOutputStream實例對象進行連接而產生一個通信管道.PipedOutputStream可以向管道中寫入數 據,PipedIntputStream可以讀取PipedOutputStream向管道中寫入的數據.這兩個類主要用來完成線程之間的通信.一個線程 的PipedInputStream對象能夠從另外一個線程的PipedOutputStream對象中讀取數據.
PipedInputStream與PipedOutputStream類的編程實例(兩個線程間進行通信的實例程序)

 

發送者

import java.io.IOException;
import java.io.PipedOutputStream;
import java.util.Scanner;

public class Sender extends Thread {
    private PipedOutputStream out = new PipedOutputStream();

    public PipedOutputStream getOut(){
        return out;
    }
   
    public void run(){
        System.out.println("請輸入您要發送的內容：");
        Scanner sc = new Scanner(System.in);
        String comtent = sc.next();
        //String strInfo = new String("Hello,rec");
        try {
            //out.write(strInfo.getBytes());
            out.write(comtent.getBytes());
            out.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            //System.out.println(e);
        }
    }
}

 

接收者

 

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

public class Receiver extends Thread{
    private PipedInputStream in = new PipedInputStream();

    public PipedInputStream getIn(){
        return in;
    }
   
    public void run(){
        byte [] buf = new byte[1024];
        try {
            int len = in.read(buf);
            System.out.println("the following message comes form sender:/n"
                    +new String(buf,0,len));
            in.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            //System.out.println(e);
        }
    }

}

 

測試程序

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

public class PipedStreamTest {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Sender send = new Sender();
        Receiver receiv = new Receiver();
        PipedOutputStream out = send.getOut();
        PipedInputStream in = receiv.getIn();
        try {
            out.connect(in);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        send.start();
        receiv.start();
    }

}