public class Demo03 {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.YEAR,2018);
        //month從0開始至11，代表1-12
        calendar.set(Calendar.MONTH,1);
        calendar.set(Calendar.DAY_OF_MONTH,14);

        int month = calendar.get(Calendar.MONTH)+1;
        String weekday = getWeek(calendar.get(Calendar.DAY_OF_WEEK));
        System.out.println(weekday);
    }
    public static String getWeek(int a){
        //西方的星期的開始為週日，中國為週一。
        String[] strings = {" ","星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
        return strings[a];
    }
}