Best way to initialize final field in an abstract class

I have in mind two ways to initialize a final field in an abstract class and I have to pick the most elegant, correct and understandable for other developers way. There will be at least 10 implementations of my abstract class. Any ideas on which one should I choose?

First way:

public sealed abstract class GuiComponent permits DummyComponent {

    private final Node internalNode;

    //------Constructor

    protected GuiComponent() {
        internalNode = Objects.requireNonNull(initInternalNode());
    }

    //------Protected

    protected abstract Node initInternalNode();

    protected final Node getInternalNode() {
        return internalNode; //subclasses will use this
    }

}

public final class DummyComponent extends GuiComponent {

    @Override
    protected Node initInternalNode() {
        HBox hbox = new HBox();
        //some Node preparation
        return hbox;
    }

}

Second way:

public sealed abstract class GuiComponent permits DummyComponent {

    private final Node internalNode;

    //------Constructor

    protected GuiComponent(Node internalNode) {
        this.internalNode = Objects.requireNonNull(internalNode);
    }

    //------Protected

    protected final Node getInternalNode() {
        return internalNode; //subclasses will use this
    }

}

public final class DummyComponent extends GuiComponent {

    //------Constructor

    public DummyComponent() {
        super(initInternalNode());
    }

    //------Private

    private static Node initInternalNode() {
        HBox hBox = new HBox();
        //...
        return hBox;
    }

}