判断输入一个日期判断是星期几，日期星期几,import java.import java.util.Scanner;public class Test321 { /** * 杨先刚 2012-09-27 */ public static void main(String[] args) { System.out.print("请输入一个年份："); Scanner input = new Scanner(System.in); int year = input.nextInt(); System.out.print("请输入一个月份："); Scanner input1 = new Scanner(System.in); int month = input1.nextInt(); System.out.print("请输入月份中的某一天："); Scanner input2 = new Scanner(System.in); int day = input2.nextInt(); if(month==1){ month=13; year=year-1; } if(month==2){ month=14; year=year-1; } int h = (int) ((day + Math.floor(26 * (month + 1) / 10) + (year % 100) + Math.floor((year % 100) / 4) + Math.floor(Math.abs(year / 100) / 4) + 5 * Math .abs(year / 100)) % 7); switch (h) { case 0: System.out.print("该日为星期六"); break; case 1: System.out.print("该日为星期天"); break; case 2: System.out.print("该日为星期一"); break; case 3: System.out.print("该日为星期二"); break; case 4: System.out.print("该日为星期三"); break; case 5: System.out.print("该日为星期四"); break; case 6: System.out.print("该日为星期五"); break; } }}//该片段来自于http://byrx.net