管道流

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

public class PipedInputStreamDemo {
    public static void main(String[] args) throws IOException{ 
        PipedInputStream pis =new PipedInputStream();
        PipedOutputStream pos =new PipedOutputStream();
        pis.connect(pos);
        Reader r =new Reader(pis);
        Writer w =new Writer(pos);
        new Thread(r).start();
        new Thread(w).start();
    }

}
class Reader implements Runnable{
    private PipedInputStream pis;
    
    public Reader(PipedInputStream pis) {
        super();
        this.pis = pis;
    }

    public void run(){
        byte[] buf =new byte[1024];
        int ch =0;
        try {
            while((ch=pis.read(buf))!=-1){
                System.out.println(new String(buf,0,ch));
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}
class Writer implements Runnable{
    private PipedOutputStream pos;
    
    public Writer(PipedOutputStream pos) {
        super();
        this.pos = pos;
    }

    public void run(){
        try {
            pos.write("abcdefgh".getBytes());
            pos.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}