Introducing just numbers form an interval in a TextField in Java

Question

How can I add just numbers betwwen 0 and 255 in a FormattedTextField in Java?

I tried this way :

private JFormattedTextField text4;
//...
text4= new JFormattedTextField(paymentFormat);
    text4.getValue();
    text4.setColumns(3);
    try {
        MaskFormatter mask = new MaskFormatter("###");
        mask.install(text4);
    } catch (ParseException ex) {
       System.out.print("Valoarea nu e corecta");
    }

and it doesn`t work...

Answer 1

there are two ways

• use JSpinner instead of JFormattedTextField, to set proper range in SpinnerNumberModel

• add DocumentFilter to JFormattedTextField, and determine if Integer, Double value is less than 0 and more than 255

• setMinimum / setMaximum for proper XxxFormatter

• add DocumentListener to display overloading for JFormattedTextField