CaelumF

public class Controller extends PircBot implements Initializable{
    @FXML
    TextArea textArea;
    @FXML
    TextField textField;

    public void onTextFieldAction(){
        textArea.setText(textArea.getText() + "\n" + textField.getText());
        sendMessage("##CoderdojoBots", textField.getText()); //Sends message
        textField.clear(); // Clears input field

CaelumF

package sample;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;

import java.net.URL;
import java.util.ResourceBundle;