IO (管道流Demo)

import java.io.*;
class Read implements Runnable
{
    private PipedInputStream in ;
    Read(PipedInputStream in)
    {
        this.in = in;
    }
    public void run()
    {
        try
        {
            byte[] buf = new byte[1024];
            System.out.println("读取前。。没有数据，心塞");
            int len = in.read(buf);
            System.out.println("读到数据。。不心塞");
            String s = new String(buf,0,len);
            System.out.println(s);
            in.close();
        }
        catch (IOException e)
        {
            throw new RuntimeException("管道读取流失败");
        }
    }
}

class Write implements Runnable
{
    private PipedOutputStream out;
    Write(PipedOutputStream out)
    {
        this.out = out;
    }
    public void run()
    {
        try
        {
            System.out.println("开始写入数据，等待6秒");
            Thread.sleep(6000);
            out.write("piped comming".getBytes());
            out.close();
        }
        catch (Exception e)
        {
            throw new RuntimeException("管道输出流失败");
        }
    }
}

class PipedStreamDemo 
{
    public static void main(String[] args) throws IOException
    {
        PipedInputStream in = new PipedInputStream();
        PipedOutputStream out = new PipedOutputStream();
        in.connect(out);

        Read r = new Read(in);
        Write w = new Write(out);
        new Thread(r).start();
        new Thread(w).start();
    }
}