How to disable Button when TextField is empty?

Question

In the following code I have a TextField and a Button. I need to disable the Button when ever the TextField is empty, so that I can avoid entering empty values to the databa

Answer 1

The other way can be using bindings:

final TextField textField1 = new TextField();
final TextField textField2 = new TextField();
final TextField textField3 = new TextField();

BooleanBinding bb = new BooleanBinding() {
    {
        super.bind(textField1.textProperty(),
                textField2.textProperty(),
                textField3.textProperty());
    }

    @Override
    protected boolean computeValue() {
        return (textField1.getText().isEmpty()
                && textField2.getText().isEmpty()
                && textField3.getText().isEmpty());
    }
};

Button btn = new Button("Button");
btn.disableProperty().bind(bb);

VBox vBox = new VBox();
vBox.getChildren().addAll(textField1, textField2, textField3, btn);