FocusEvent doesn't get the last value of JFormattedTextField, How I can get it?

Question

I have two JFormattedTextField objects on my JFrame object. I want a basic Math (addition) by the values of these JFormattedTextField

Answer 1

I think you should use a PropertyChangeListener, see How to Write a Property Change Listener.

There is an example using JFormattedTextField:

//...where initialization occurs:
double amount;
JFormattedTextField amountField;
...
amountField.addPropertyChangeListener("value",
                                      new FormattedTextFieldListener());
...
class FormattedTextFieldListener implements PropertyChangeListener {
    public void propertyChanged(PropertyChangeEvent e) {
        Object source = e.getSource();
        if (source == amountField) {
            amount = ((Number)amountField.getValue()).doubleValue();
            ...
        }
        ...//re-compute payment and update field...
    }
}