This is a short codesample to create a Label and a TextBox:

    Label labelNode = new Label(label);
    GridPane.setConstraints(labelNode, 0, row);
    GridPane.setHalignment(labelNode, HPos.RIGHT);
    GridPane.setValignment(labelNode, VPos.BASELINE);

    TextBox textNode = new TextBox();
    GridPane.setConstraints(textNode, 1, row);
    GridPane.setHalignment(textNode, HPos.LEFT);
    GridPane.setValignment(textNode, VPos.BASELINE);

I use this code in a method to create a input form. In the attachment you can see the layout problems. The TextBox input is aligned to high on the top.

br, josh