CODEWITHSUNDEEP
javajavafx
John Castor
John Castor

Reputation: 1

How to make text area within JavaFX to be accepting only text input, no numbers?

I would like to know whether it is possible to make text area in JavaFX to accept only text format, no numbers - in the worst case at least to say to user when typing numbers inside this text area that it's forbidden.

Upvotes: 0

Views: 258

Answers (2)

John Castor
John Castor

Reputation: 1

Solution: is quite simple, just check the text inside text area with this method :

 if (!Pattern.matches("[a-zA-Z]+", userInputText.getText())){
            System.out.println("wrong input");
        }

I have personally added this onHandleKeyReleased action event:

@FXML
public void handleKeyReleased() {
    String text = userInputText.getText();
    boolean disableButtons = text.isEmpty() || text.trim().isEmpty() || (!Pattern.matches("[a-zA-Z]+", userInputText.getText())) ;
    okButton.setDisable(disableButtons);
}

So after user writes any number inside the text field, the button for confirming his action will be disabled, so it will look like this:

correct input

incorrect input

This should work with input UI element within JavaFx.

Upvotes: -1

guillaume girod-vitouchkina
guillaume girod-vitouchkina

Reputation: 3079

for number : What is the recommended way to make a numeric TextField in JavaFX?

try invert it (near match !)

textField.textProperty().addListener(new ChangeListener<String>() {
    @Override
    public void changed(ObservableValue<? extends String> observable, String oldValue, 
        String newValue) {
        if (!newValue.matches("\\d*")) {
            textField.setText(newValue.replaceAll("[^\\d]", ""));
        }
    }
});

Upvotes: -2

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