FocusListener例如，A 会有所帮助…
JXDatePicker dp = new JXDatePicker(); dp.getEditor().addFocusListener(new FocusAdapter() { @Override public void focusLost(FocusEvent e) { // Calculate age Date date = dp.getDate(); } });有关更多详细信息，请参见如何编写焦点侦听器。
最好使用JodaTime或Java 8的新Time API完成年龄计算
Java 8
Date date = // Date from date pickerLocalDate ld = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();//LocalDate ld = LocalDate.of(1972, Month.MARCH, 8);Period p = Period.between(ld, LocalDate.now());System.out.println(p.getYears());System.out.println(p.getMonths());System.out.println(p.getDays());
输出类似…
421118
乔达时代
Date date = // Date from date pickerLocalDate ld = LocalDate.fromDateFields(date);Period p = Period.fieldDifference(ld, LocalDate.now());System.out.println(p.getYears());System.out.println(p.getMonths());System.out.println(p.getDays());
