public boolean handleEvent(Event event) {
        switch(event.id) {
        case Event.ACTION_EVENT:
            if (event.target == OKButton) {
                try {
                    int birthdayYear = Integer.parseInt(birthdayYearField.getText());
                    int birthdayMonth = Integer.parseInt(birthdayMonthField.getText());
                    int birthdayDate = Integer.parseInt(birthdayDateField.getText());

                    int calcYear = Integer.parseInt(calcYearField.getText());
                    int calcMonth = Integer.parseInt(calcMonthField.getText());
                    int calcDate = Integer.parseInt(calcDateField.getText());

                    if (birthdayMonth >= 1 && birthdayMonth <= 12 && calcMonth >=1 && calcMonth <= 12) {
                        yourBiorhythm.setBirthday(birthdayYear, birthdayMonth, birthdayDate);
                        yourBiorhythm.setCalculateDay(calcYear, calcMonth, calcDate);
                    }
                } catch (NumberFormatException ex) {
                } finally {
                    biorhythmCanvas.repaint();
                    this.dispose();
                }
                return true;
            } else if (event.target == cancelButton) {
                this.dispose();
                return true;
            }
            break;
        case Event.WINDOW_DESTROY:
            this.dispose();
            return true;
        default:
            break;
        }
        return false;
    }