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java
4 years ago
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import java.util.Arrays;
import java.util.Scanner;
import java.util.Date;
import java.text.SimpleDateFormat;
import java.text.DateFormat;
import java.text.ParseException;
import java.util.Calendar;
public class Main {
/*** Get user's input (select feature) and calls the corresponding function
* @param args, preset param
* @throws
* @return
* Example: If user inputs 'B',
* then user will be asked to input a year, and transform(year) will be called.
* Time estimate: O(n)
*/
public static void main(String[] args) {
while(true) {
System.out.print("輸入指令號碼或 E(結束使用)\n");
System.out.print("輸入指令:\n");
System.out.print("1) A 顯示該月月曆\n");
System.out.print("2) B 西元轉換干支、生肖\n");
System.out.print("3) C 計算天數\n");
System.out.print("4) D 計算日期\n");
System.out.print("5) E 離開\n\n");
Scanner scanner = new Scanner(System.in);
String select = scanner.next();
switch(select) {
case "A":
System.out.println("請輸入欲查詢日期(年/月/日)：");
// Scanner scannerA = new Scanner(System.in);
String dateA = scanner.next();
showMonth(dateA);
break;
case "B":
System.out.print("請輸入欲查詢年：\n");
String year = scanner.next();
transform(year);
break;
case "C":
// Scanner scannerC = new Scanner(System.in);
System.out.print("請輸入欲查詢日期(年/月/日)：\n");
String date = scanner.next();
calDays(date);
// scannerC.close();
break;
case "D":
System.out.println("請輸入往後推算得天數：");
Scanner scannerD = new Scanner(System.in);
int count = scanner.nextInt();
calDate(count);
scannerD.close();
break;
case "E":
System.out.println("---EXIT---");
scanner.close();
System.exit(0);
break;
default:
System.out.println("請重新輸入");
break;
}
}
}
/*** Show monthly calendar
* @param string, input date
* @throws ParseException
* If the date is not in "yyyy/MM/dd" format, or
* missing either year, month or day in the string,
* ParseException will be thrown.
* @return
* Example: showMonth("2022/03/24"), shows the monthly calendar of 2022/03.
* Time estimate: O(7*root(7))
*/
private static void showMonth(String string) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
try {
Date date = sdf.parse(string);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
// int month = calendar.get(Calendar.MONTH);
// int year = calendar.get(Calendar.YEAR);
calendar.set(Calendar.DAY_OF_MONTH, 1);
int firstDayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
int daysInMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
//
// System.out.println(month);
// System.out.println(year);
// System.out.println(firstDayOfWeek);
// System.out.println(daysInMonth);
System.out.println("Sun Mon Tus Wen Thu Fri Sat");
//print space until the first day of month
for (int i = 0; i < firstDayOfWeek - 1; i++) {
System.out.print(" ");
}
for (int i = 1, day = firstDayOfWeek; i<=daysInMonth; i++, day++){
System.out.printf("%3d ", i);
day = day%7;
if(day == 0)
System.out.print('\n');
}
System.out.println();
return ;
} catch (ParseException e) {
System.out.println("Wrong input format!\n");
return;
}
}
/*** Parse the corresponding heaven sign from string
* @param string, input year
* @throws
* @return
* Example: Zodiac("2022"), heaven = "壬".
* Time estimate: O(1)
*/
private static String Heaven(String string) {
String heaven = "";
int number = Integer.parseInt(string) % 10;
switch(number){
case 0:
heaven = "庚";
break;
case 1:
heaven = "辛";
break;
case 2:
heaven = "壬";
break;
case 3:
heaven = "癸";
break;
case 4:
heaven = "甲";
break;
case 5:
heaven = "乙";
break;
case 6:
heaven = "丙";
break;
case 7:
heaven = "丁";
break;
case 8:
heaven = "戊";
break;
case 9:
heaven = "己";
break;
default:
System.out.println("Wrong input format!\n");
}
return heaven;
}
/*** Parse the corresponding earth sign from string
* @param string, input year
* @throws
* @return
* Example: Zodiac("2022"), earth = "寅".
* Time estimate: O(1)
*/
private static String Earth(String string) {
String earth = "";
int number = Integer.parseInt(string) % 12;
switch(number){
case 0:
earth = "申";
break;
case 1:
earth = "酉";
break;
case 2:
earth = "戌";
break;
case 3:
earth = "亥";
break;
case 4:
earth = "子";
break;
case 5:
earth = "丑";
break;
case 6:
earth = "寅";
break;
case 7:
earth = "卯";
break;
case 8:
earth = "辰";
break;
case 9:
earth = "巳";
break;
case 10:
earth = "午";
break;
case 11:
earth = "未";
break;
default:
System.out.println("Wrong input format!\n");
}
return earth;
}
/*** Parse the corresponding zodiac sign from string
* @param string, input year
* @throws
* @return
* Example: Zodiac("2022"), zodiac = "虎".
* Time estimate: O(1)
*/
private static String Zodiac(String string) {
String zodiac = "";
int number = Integer.parseInt(string) % 12;
switch(number){
case 0:
zodiac = "猴";
break;
case 1:
zodiac = "雞";
break;
case 2:
zodiac = "狗";
break;
case 3:
zodiac = "豬";
break;
case 4:
zodiac = "鼠";
break;
case 5:
zodiac = "牛";
break;
case 6:
zodiac = "虎";
break;
case 7:
zodiac = "兔";
break;
case 8:
zodiac = "龍";
break;
case 9:
zodiac = "蛇";
break;
case 10:
zodiac = "馬";
break;
case 11:
zodiac = "羊";
break;
default:
System.out.println("Wrong input format!\n");
}
return zodiac;
}
/*** Check whether the input year for transform() is valid
* @param stringToCheck, input year
* @param radix, range for Character.digit()
* @throws
* @return true if input year is valid. Otherwise, false.
* Example: isStringInteger("-1", 10), return false.
* Time estimate: O(n)
*/
public static boolean isStringInteger(String stringToCheck, int radix) {
if(stringToCheck.isEmpty()) return false; //Check if the string is empty
for(int i = 0; i < stringToCheck.length(); i++) {
if(Character.digit(stringToCheck.charAt(i),radix) < 0) return false;
}
return true;
}
/*** Convert western years to sexagenary circle and zodiac
* @param string, input year
* @throws ParseException
* If the date is not in "yyyy/MM/dd" format, or
* missing either year, month or day in the string,
* ParseException will be thrown.
* @return
* Example: transform("2022"), shows "2022年是壬寅年，屬虎".
* Time estimate: O(n)
*/
private static void transform(String string) {
if(!isStringInteger(string, 10)){
System.out.println("Wrong input format!");
}
else{
String heaven = Heaven(string);
String earth = Earth(string);
String zodiac = Zodiac(string);
System.out.println(string+"是"+heaven+earth+"年，屬"+zodiac);
}
return ;
}
/*** Calculate days
* @param string, input date
* @throws ParseException
* If the date is not in "yyyy/MM/dd" format, or
* missing either year, month or day in the string,
* ParseException will be thrown.
* @return
* Example: calDays("2022/04/01"), shows "2022/04/01距離今天還有8天".
* Time estimate: O(1)
*/
private static void calDays(String string) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
try {
Date date = sdf.parse(string);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
Calendar calendar2 = Calendar.getInstance();
Date today = calendar2.getTime();
int days = (int) ((date.getTime()-today.getTime()) / (1000*3600*24));
days = days>=0?days+1:days;
System.out.println(string + "距離今天還有" + days + "天\n");
return ;
} catch (ParseException e) {
System.out.println("Wrong input format!");
return ;
}
}
/*** Calculate Date
* @param count, input number of days after
* @throws ParseException
* If the date is not in "yyyy/MM/dd" format, or
* missing either year, month or day in the string,
* ParseException will be thrown.
* @return
* Example: calDate("10"), shows "往後10天是2022/04/03".
* Time estimate: O(1)
*/
private static void calDate(int count) {
if(count<0) {
System.out.println("Wrong input format!\n");
return;
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
String ans = "";
Calendar calendar = Calendar.getInstance();
Date startDay = calendar.getTime();
Calendar cl = Calendar.getInstance();
cl.setTime(startDay);
cl.add(Calendar.DATE, count);
ans = sdf.format(cl.getTime());
System.out.println("往後" + count + "天是" + ans + "\n");
}
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