Как реализовано глубокое клонирование в java

public class MyClass implements Cloneable {
    private int x;
    private String str;
    private MyOtherClass obj;

    // constructors, getters, and setters

    @Override
    public Object clone() throws CloneNotSupportedException {
        MyClass cloned = (MyClass) super.clone();
        cloned.obj = (MyOtherClass) obj.clone();
        return cloned;
    }
}

public class MyOtherClass implements Cloneable {
    private int y;
    private String str2;

    // constructors, getters, and setters

    @Override
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }
}

public class MyClass implements Serializable {
    private int x;
    private String str;
    private MyOtherClass obj;

    // constructors, getters, and setters

    public MyClass deepCopy() throws IOException, ClassNotFoundException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(this);

        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        ObjectInputStream ois = new ObjectInputStream(bais);
        return (MyClass) ois.readObject();
    }
}

public class MyOtherClass implements Serializable {
    private int y;
    private String str2;

    // constructors, getters, and setters
}