JCalendar sets to March 30 when February is chosen

Question

Code consists of just month and year can be chosen in jcalendar, by default the day is 30 and 28 for February, the issue comes when I choose February, automatically jcalendar sets to March 30; this is the code; it is in PropertyChange event of jcalendar.

Calendar cal = PFI.getCalendar();
int day = cal.get(Calendar.DAY_OF_MONTH);
int month = cal.get(Calendar.MONTH);
int year = cal.get(Calendar.YEAR);
if(month==1){
    cal.set(year, 1 , 28);
    PFI.setCalendar(cal);
}
else
{
    cal.set(year, month , 30);
    PFI.setCalendar(cal);
}

Answer 1

Combining the suggestions of @Ole V.V. and @Catalina Island, the fragment below illustrates JYearChooser and JMonthChooser in a GridLayout. A common listener then uses java.time to display the last day of the selected year and month.

JPanel panel = new JPanel(new GridLayout(1, 0));
JMonthChooser jmc = new JMonthChooser();
JYearChooser jyc = new JYearChooser();
JLabel label = new JLabel("Last day of month:");
label.setHorizontalAlignment(JLabel.RIGHT);
JTextField last = new JTextField(8);
label.setLabelFor(last);
PropertyChangeListener myListener = new PropertyChangeListener() {
    @Override
    public void propertyChange(PropertyChangeEvent e) {
        LocalDate ld = LocalDate.of(jyc.getYear(), jmc.getMonth() + 1, 1)
            .with(TemporalAdjusters.lastDayOfMonth());
        last.setText(ld.format(DateTimeFormatter.ISO_DATE));
    }
};
myListener.propertyChange(null);
jmc.addPropertyChangeListener("month", myListener);
jyc.addPropertyChangeListener("year", myListener);
panel.add(jyc);
panel.add(jmc);
panel.add(label);
panel.add(last);