Java PipedOutputStream .connect (PipedInputStream snk)

public void connect(PipedInputStream snk)  throws IOException

import java.io.PipedInputStream;
import java.io.PipedOutputStream;
// w w  w .j  a  v a 2 s .c o  m
public class Main extends PipedInputStream {

  public static void main(String[] args) throws Exception {

    PipedOutputStream out = new PipedOutputStream();
    Main in = new Main();

    // connect input and output
    out.connect(in);

    // write something
    out.write(70);
    out.write(71);

    // print what we wrote
    for (int i = 0; i < 2; i++) {
      System.out.println("" + (char) in.read());
    }
    out.close();
  }
}