Question

java试题，急

Answer 1

import java.util.Scanner;
public class TestWeek {
	public static void main(String[] args) {
		while(true){
			Scanner in=new Scanner(System.in);
			System.out.println("请输入年：");
			int year=in.nextInt();
			System.out.println("请输入月：");
			int month=in.nextInt();
			System.out.println("请输入日：");
			int day=in.nextInt();
			System.out.print("这一天是星期");
			if(month==1||month==2){
				year--;
				month+=12;
			}
//			int N=d+2n+[3(n+1)/5]+y+[y/4]-[y/100]+[y/400]+1
			int N=day+month*2+((month+1)*3)/5+year+year/4-year/100+year/400+1;
			int x=N%7;
			if(x==0){
				System.out.println("日");
			}else if(x==1){
				System.out.println("一");
			}else if(x==2){
				System.out.println("二");
			}else if(x==3){
				System.out.println("三");
			}else if(x==4){
				System.out.println("四");
			}else if(x==5){
				System.out.println("五");
			}else if(x==6){
				System.out.println("六");
			}
		}
	}
}

运行结果：

追问

请问是对话框显示吗

Answer 2

以输入为：2015.04.17为例：
String date = "2015.04.17";
String[] dates = date.split(".");
int y = Integer.pareseInt(dates[0]);
int m = Integer.pareseInt(dates[1]);
int d = Integer.pareseInt(dates[2]);
if(m==1 || m==2){
m+=12;y-=1;
}
int N = d+2m+[3(m+1)/5]+y+[y/4]-[y/100]+[y/400]+1;
int result = N%7;
//结果result就是所求。