FAQ: Serialization: Lesson - Custom Serialization

This community-built FAQ covers the “Custom Serialization” exercise from the lesson “Serialization: Lesson”.

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This exercise can be found in the following Codecademy content:

[BETA] Learn Intermediate Java

FAQs on the exercise Custom Serialization

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How could they use getters without creating them first? As in

private void writeObject(java.io.ObjectOutputStream stream) throws IOException{

In Learn Java, they first created getters as type methods like this

public String getName() {
    return name;

Also, what good reason may be there to go to the trouble of creating all those writeObject/read.Object methods instead of just adding the words implements Serializable after public class DateOfBirth? I wish it was properly explained (and why I may need all that serialization at all too)

UPD: It turns out, if you click that little folder icon, you can see other classes too, including the Engine class with the getters! I wish someone told me that at some point earlier

Why does it insist on using this. keywords? As was explained in Learn Java, I need it only if local variables have the same name as instance variables