package nn;import java.util.*;//import java.lang.*;public class mm{public static boolean judgeYear(int year) {if (year % 400 == 0)return true;else if ((year % 4 == 0) && (year % 100 != 0))return true;elsereturn false;}public static int getWeekOfDate(int year, int month, int day) {int week = -1;int[] monthDay = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };boolean isLeapYear = false;int sumDay = 0;if (year >= 1900) {for (int i = 1900; i < year; i++) {if (judgeYear(i))sumDay += 366;elsesumDay += 365;}for (int i = 0; i < month - 1; i++) {sumDay += monthDay[i];}if (month > 2) {isLeapYear = judgeYear(year);if (isLeapYear)sumDay++;}sumDay += day;week = sumDay % 7;}return week;}public static String convert(int week) {String[] weekName = { "星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };return weekName[week];}public static void main(String[] args) {int year, month, day;Scanner sc = new Scanner(System.in);while (true) {System.out.println("请输入年:以0结束");year = sc.nextInt();if (year == 0) {System.out.println("结束！");sc.close();return;}if (year < 1900) {System.out.println("请输入1900以后的年份");continue;}System.out.println("请输入月:");month = sc.nextInt();while (month > 12 || month < 1) {System.out.println("请输入1-12间的月份");}System.out.println("请输入日:");day = sc.nextInt();while (!(day > 0 && day < 32)) {System.out.println("请输入1号到31号间的日期");}System.out.println();int week = getWeekOfDate(year, month, day);System.out.println(convert(week));System.out.println();}}}