I want text containing integer "expense" will be changed, when "expense" changes itself. But when "expense" variable changes the text continues to display 0. As far as I know it must be solved by binding? How?

```
    int expense=0;
    Text expenseAmmount = new Text(String.valueOf(NumberFormat.getIntegerInstance().format(expense)) + " $");

    TextFlow moneyStatus = new TextFlow();
    TextFlow incomeStatus = new TextFlow();
    TextFlow expenseStatus = new TextFlow();

    incomeStatus.getChildren().addAll(incomeLabel,incomeAmmount);
    expenseStatus.getChildren().addAll(expenseLabel,expenseAmmount);
    moneyStatus.getChildren().addAll(moneyLabel,moneyAmmount);

```