package com.example;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Scanner;

public class Test12 {

?? ?public static void main(String[] args) {
?? ??? ?// TODO Auto-generated method stub
?? ??? ?Scanner scanner = new Scanner(System.in);
?? ??? ?System.out.println("請(qǐng)輸入年份！查詢范圍是 1900-2900");
?? ??? ?int year = scanner.nextInt();
?? ??? ?System.out.println("請(qǐng)輸入月份！查詢范圍是 1-12");
?? ??? ?int month = scanner.nextInt();
?? ??? ?System.out.println("請(qǐng)輸入日期！查詢范圍是1-" + getMonth(month, year));
?? ??? ?int day = scanner.nextInt();

?? ??? ?Calendar calendar = Calendar.getInstance();
?? ??? ?calendar.set(Calendar.YEAR, year);
?? ??? ?calendar.set(Calendar.MONTH, month - 1);
?? ??? ?calendar.set(Calendar.DAY_OF_MONTH, day);

?? ??? ?System.out.println(year + "年" + (isRunYear(year) ? "是閏年" : "不是閏年"));
?? ??? ?System.out.println("本月有" + getMonth(month, year) + "天");
?? ??? ?int totalDays = 0;
?? ??? ?for (int i = 1900; i < year; i++) {
?? ??? ??? ?totalDays += isRunYear(i) ? 366 : 365;
?? ??? ?}
?? ??? ?int nowDays = calendar.get(Calendar.DAY_OF_YEAR);
?? ??? ?totalDays += nowDays;
?? ??? ?System.out.println(year + "-" + month + "-" + day + "距1900年1月1日已有" + totalDays + "天");
?? ??? ?System.out.println(year + "-" + month + "-" + day + "距本年1月1日已有" + nowDays + "天");
?? ??? ?calendar.set(Calendar.DAY_OF_MONTH, 1);
?? ??? ?System.out.println("本月的第一天為" + getFormatTime("EEEE", calendar.getTime()));

?? ??? ?System.out.println("本月日歷為：");
?? ??? ?
?? ??? ?// 這里只是簡(jiǎn)單的輸出字符串，假如在 Android Studio 的類似的開發(fā)平臺(tái)中自定義日歷的話，可以將泛型 String 換
?? ??? ?// 成相應(yīng)的 JavaBean 對(duì)象來存儲(chǔ)數(shù)據(jù)和做標(biāo)記，如標(biāo)記是當(dāng)月，是否被選中等。?? ??? ?

?? ??? ?List<String> list = new ArrayList<>();

?? ??? ?// 得到本月一號(hào)的星期索引
?? ??? ?// 索引從 1 開始，第一個(gè)為星期日,減 1 是為了與星期對(duì)齊，如星期一對(duì)應(yīng)索引1，星期二對(duì)應(yīng)索引二
?? ??? ?int weekIndex = calendar.get(Calendar.DAY_OF_WEEK) - 1;
?? ??? ?// 拿到上一個(gè)月的最后幾天的天數(shù)
?? ??? ?for (int i = 0; i < weekIndex; i++) {
?? ??? ??? ?list.add("");
?? ??? ?}
?? ??? ?
?? ??? ?int currentDays = getMonth(month, year);
?? ??? ?
?? ??? ?// 拿到當(dāng)月的天數(shù)
?? ??? ?for (int i = 0; i < currentDays; i++) {
?? ??? ??? ?int days = i + 1;
?? ??? ??? ?if (days == day) {
?? ??? ??? ??? ?list.add("@" + days);
?? ??? ??? ?} else {
?? ??? ??? ??? ?list.add(days + "");
?? ??? ??? ?}
?? ??? ?}
?? ??? ?
?? ??? ?// 拿到下個(gè)月第一周的天數(shù)
?? ??? ?// 先拿到本月最后一天的星期索引
?? ??? ?calendar.set(Calendar.DAY_OF_MONTH, currentDays);
?? ??? ?weekIndex = calendar.get(Calendar.DAY_OF_WEEK) - 1;
?? ??? ?
?? ??? ?for (int i = 0; i < 6 - weekIndex; i++) {
?? ??? ??? ?list.add("");
?? ??? ?}
?? ??? ?
?? ??? ?String[] weeks = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
?? ??? ?for (int i = 0; i < weeks.length; i++) {
?? ??? ??? ?System.out.print(getFormatString(weeks[i]));
?? ??? ?}
?? ??? ?
?? ??? ?System.out.println();
?? ??? ?
?? ??? ?int i = 0;
?? ??? ?for (String s : list) {
?? ??? ??? ?System.out.print(getFormatString(s));
?? ??? ??? ?if ((i + 1) % 7 == 0) {
?? ??? ??? ??? ?System.out.println();
?? ??? ??? ?}
?? ??? ??? ?i++;
?? ??? ?}
?? ??? ?System.out.println("謝謝使用！");
?? ?}
?? ?
?? ?public static String getFormatString(String s) {
//?? ??? ?return String.format("%8s", s);
?? ??? ?return s + "\t";
?? ?}
?? ?// 判斷是否為閏年
?? ?public static boolean isRunYear(int y) {
?? ??? ?return y % 4 == 0 && y % 100 != 0 || y % 400 == 0;
?? ?}

?? ?public static String getFormatTime(String p, Date t) {
?? ??? ?return new SimpleDateFormat(p, Locale.CHINESE).format(t);
?? ?}
?? ?// 獲取當(dāng)月的天數(shù)
?? ?public static int getMonth(int m, int y) {
?? ??? ?switch (m) {
?? ??? ?case 2:
?? ??? ??? ?return isRunYear(y) ? 29 : 28;
?? ??? ?case 4:
?? ??? ?case 6:
?? ??? ?case 9:
?? ??? ?case 11:
?? ??? ??? ?return 30;
?? ??? ?default:
?? ??? ??? ?return 31;
?? ??? ?}
?? ?}
}