Using Serialization

You can place any object into a stream by simply

FileOutputStream underlyingStream = new FileOutputStream("/tmp/file");
ObjectOutputStream serializer = new ObjectOutputStream(underlyingStream);
serializer.writeObject(serializableObject);

Later, you can read it with

FileInputStream underlyingStream = new FileInputStream("/tmp/file");
ObjectInputStream deserializer = new ObjectInputStream(underlyingStream);
Object deserializedObject = deserializer.readObject();
//hmmmm, must typecast deserializerObject but, to what?