car
				public class TestMain {
    public static void main(String[] args) {
        int n = 1;//输入的日期数字1-7
        LocalDate date = LocalDate.now();
        int year = date.getYear();
        LocalDate startDate = LocalDate.parse(year+"-01-01");
        LocalDate endDate = LocalDate.parse(year+"-12-31");
        int startDay = startDate.getDayOfYear();
        int endDay = endDate.getDayOfYear();
        DayOfWeek dayOfWeek = null;
        while (startDay <= endDay) {
            dayOfWeek = startDate.getDayOfWeek();
            int value = dayOfWeek.getValue();
            if (value == n) {
                System.out.println(startDate);
            }
            startDate = startDate.plusDays(1);
            startDay++;
        }
    }
}