Sé que Java I / O usa un patrón decorador. Pero siento que entiendo que está mal.

Aclare la diferencia entre dos fragmentos de código:

fragmento 1:

    PipedInputStream pipedInputStream = new PipedInputStream();
    PipedOutputStream pipedOutputStream = new PipedOutputStream();
    pipedOutputStream.connect(pipedInputStream);


    ObjectOutputStream objectOutputStream = new ObjectOutputStream(pipedOutputStream);

    objectOutputStream.writeObject("this is my string");

    ObjectInputStream objectInputStream = new ObjectInputStream(pipedInputStream);

    System.out.println(objectInputStream.readObject());

Esta aplicación funciona de acuerdo con mis expectativas y veo resultados en la consola.

fragmento 2:

Intento ajustar ObjectInputStream y ObjectOutputStream dos veces:

        PipedInputStream pipedInputStream = new PipedInputStream();
        PipedOutputStream pipedOutputStream = new PipedOutputStream();
        pipedOutputStream.connect(pipedInputStream);


        ObjectOutputStream objectOutputStream = new ObjectOutputStream(pipedOutputStream);
        ObjectOutputStream objectOutputStreamWrapper = new ObjectOutputStream(objectOutputStream);     //double wrapping

        objectOutputStreamWrapper.writeObject("this is my string"),;

        ObjectInputStream objectInputStream = new ObjectInputStream(pipedInputStream);
        ObjectInputStream   objectInputStreamWrapper = new ObjectInputStream(objectInputStream);

        System.out.println(objectInputStreamWrapper.readObject());

Este código simplemente cuelga. No entiendo por qué. por favor aclarar

PD

Es solo una pregunta teórica.

ACTUALIZAR

El comportamiento realmente colgado ocurre porque uso tuberías (según la respuesta de EJP).

Por ejemplo, este código funciona según las expectativas.

            OutputStream outputStream = new FileOutputStream("2.txt");

            ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
            ObjectOutputStream objectOutputStreamWrapper = new ObjectOutputStream(objectOutputStream);     //double wrapping

            objectOutputStreamWrapper.writeObject("this is my string");
            objectOutputStream.close();

            ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream("2.txt"));
            ObjectInputStream   objectInputStreamWrapper = new ObjectInputStream(objectInputStream);


            System.out.println(objectInputStreamWrapper.readObject());
            objectInputStream.close();

Parece que si envuelvo la entrada de 10 decoradores, debo envolver la salida de 10 decoradores en el mismo orden. Es verdad ?

ACTUALIZACIÓN + 1

Noté ese problema solo con el enjuague:

PipedInputStream pipedInputStream = new PipedInputStream();
    PipedOutputStream pipedOutputStream = new PipedOutputStream();
    pipedOutputStream.connect(pipedInputStream);


    ObjectOutputStream objectOutputStream = new ObjectOutputStream(pipedOutputStream);
    ObjectOutputStream objectOutputStreamWrapper = new ObjectOutputStream(objectOutputStream);     //double wrapping

    objectOutputStreamWrapper.writeObject("this is my string");

    objectOutputStreamWrapper.flush();

    ObjectInputStream objectInputStream = new ObjectInputStream(pipedInputStream);
    ObjectInputStream   objectInputStreamWrapper = new ObjectInputStream(objectInputStream);

    System.out.println(objectInputStreamWrapper.readObject());