TextField get Text javaFx

Im trying to get the text from textfield but value from but cant get the value what will be the problem in it.

TextField field=new TextField(); ` public void onTextChange() {

    String text = field.getText();
    List<Character> charList=text.chars().mapToObj(e->(char)e).collect(Collectors.toList());
    for (Character character : charList) {
        originator.setWord(character);
        caretaker.addWord(originator.GetWordFromMomento());
    }
    System.out.println("String: "+text);
}`