Controller.java

package sample;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.TextArea;

public class Controller {

    @FXML
    private TextArea textArea;

    @FXML
    private void handleSubmit() {

        //create new thought, parameter from textArea
        Thought t = new Thought(textArea.getText());

        //clear textArea
        textArea.clear();


        //get the thought manager and add the thought to the manager
        ThoughtManager tm = ThoughtManager.getInstance();
        tm.add(t);
        tm.displayList();


    }
}