Letters of the values typed in a textbox control.

Thought of the characters to uppercase in a textfield that the user has typed in would be a simple task but so far I have been unable to find any information that it is possible.   In addition, in other cases, I want to be able to verify that the characters are digital only.  Can someone point me in the direction to do so, it would be greatly appreciated.

Thank you

1. make the characters to uppercase in a textfield:

     final TextField tf = new TextField();
tf.textProperty().addListener(new ChangeListener() {
            public void changed(ObservableValue observable, String oldValue, final String newValue) {
                if (newValue != null) {
final String uc  = newValue.toUpperCase(Locale.US);
                    if (!newValue.equals(uc)) {
tf.setText(uc);
                    }
                }
            }
        });

2. block non-numeric characters:

TextField tf = new TextField();
        tf.addEventFilter(KeyEvent.KEY_TYPED, new EventHandler() {
            @Override
            public void handle(KeyEvent inputevent) {
                if (!inputevent.getCharacter().matches("\\d")) {

                    inputevent.consume();
                }
            }
        });

Tags: Java

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