private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
  stream.defaultReadObject();
  if (serialVersionOnStream < 1) {
    setAlignment(this.align);
  }
  serialVersionOnStream=currentSerialVersion;
}

private void readObject ( ObjectInputStream stream ) throws IOException , ClassNotFoundException { stream . defaultReadObject ( ) ; if ( serialVersionOnStream < 1 ) { setAlignment ( this . align ) ; } serialVersionOnStream = currentSerialVersion ; }
reads this object out of a serialization stream , handling objects written by older versions of the class that didn ' t contain all of the fields we use now . .
