Accept only numbers and a dot in Java TextField

Question

I've got one textField where I only accept numbers from the keyboard, but now I have to change it as it's a "price textField" and I would also need to accept a dot "." for any kind of prices.

How can I change this in order to get what I need?

ptoMinimoField = new JTextField();
        ptoMinimoField.setBounds(348, 177, 167, 20);
        contentPanel.add(ptoMinimoField);
        ptoMinimoField.setColumns(10);
        ptoMinimoField.addKeyListener(new KeyAdapter() {
            public void keyTyped(KeyEvent e) {
                char caracter = e.getKeyChar();
                if (((caracter < '0') || (caracter > '9'))
                        && (caracter != '\b')) {
                    e.consume();
                }
            }
        });

Answer 1

I just use a try-catch block:

try {// if is number
    Integer.parseInt(String);
} catch (NumberFormatException e) {
    // else then do blah
}

Answer 2

As suggested by Oracle ,Use Formatted Text Fields

Formatted text fields provide a way for developers to specify the valid set of characters that can be typed in a text field.

amountFormat = NumberFormat.getNumberInstance();
...
amountField = new JFormattedTextField(amountFormat);
amountField.setValue(new Double(amount));
amountField.setColumns(10);
amountField.addPropertyChangeListener("value", this);