How to add children to ScrollPane - javafx

Question

Now, I've looked around for a while, but I haven't found anything that helps me. I'm trying to create a chat-based game, which utilizes JavaFX-FXML and relies on a ScrollPane.
I'm trying to create JLabels and add them to the ScrollPane dynamically.
With my own research I found that you can't set multiple children for a ScrollPane; you have to use the setContent method and have a pane to add the children inside of that, so that's what I did but I still get an error when adding the labels. It's inside the IDE and tells me I have to use a Node but I don't know what a node is.
Here's my controller:
public class Controller() {
import javax.swing.*;
import javafx.fxml.FXML;
import javafx.scene.input.*;
import javafx.scene.layout.Pane;
import javafx.scene.control.Label;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.TextField;
import javafx.scene.layout.AnchorPane;
import static jdk.nashorn.internal.objects.NativeError.printStackTrace;
private String msg;
private char[] msgA;
#FXML
private Label opt1;
#FXML
private Label opt2;
#FXML
private Label opt3;
#FXML
private TextField msgBox;
#FXML
private AnchorPane gameUI;
#FXML
private AnchorPane mainMenu;
#FXML public ScrollPane labelPane;
private boolean optionSelected = false;
private void startup(){
System.out.println("startup called! Getting player's name now..");
String mcName=JOptionPane.showInputDialog(null,"Please enter your name");
System.out.println(mcName+" was inputted, let's hope it's an appropriate name! Haha!");
JLabel label = new JLabel();
label.setName("evieHi");
label.setText("Hi "+mcName+"! How are you doing?");
labelPane.setContent(p);
opt1.setText("I'm good, how are you?");
opt2.setText("Not so well until you texted. ;D");
opt3.setText("I'm sorry, who is this?");
Pane p = new Pane();
p.getChildren().add(label);
}
}
I do realize some of the imports and variables are redundant. They're not relevant to my question so I left the methods using them out of my code I included.
Thanks in advance and I'm sorry you had to read my messy code.

Answer 1

Attempting to create a Swing UI component doesn't bode well with JavaFX...
I fixed it with the help of #James_D and #fabian pointing out what I'm to dumb to realize..
private void startup(){
System.out.println("startup called! Getting player's name now..");
mcName=JOptionPane.showInputDialog(null,"Please enter your name");
System.out.println(mcName+" was inputted,let's hope it's an appropriate name! Haha!");
Label label = new Label();
label.setText("Hi "+mcName+"! How are you doing?");
p.getChildren().add(label);
labelPane.setContent(p);
}