Question

这是一个我需要做的简单编码..问题是，在运行之后，它会显示例如“今天是2天，2天后是星期四”。而不是“今天是星期二，2天后是星期四。”

import java.util.Scanner;

公共类FindFutureDay {

public static void main(String[] args) {
    //Variable
    int day, next, future;

    //Create scanner
    Scanner input=new Scanner(System.in);

    //Input day
    System.out.println("Enter day today: ");
    day=input.nextInt();
    //Convert day to String
    String Sunday = String.valueOf(0);
    String Monday = String.valueOf(1);
    String Tuesday = String.valueOf(2);
    String Wednesday = String.valueOf(3);
    String Thursday = String.valueOf(4);
    String Friday = String.valueOf(5);
    String Saturday = String.valueOf(6);


    //Input number of days later
    System.out.println("Number of days later: ");
    next=input.nextInt();

    //Close scanner
    input.close();

    //Compute future day
    future=day+next;

    //Select result to display
    if (future%7==0){
        System.out.println("Today is "+day+" and "+next+" day later is Sunday.");
    } else if (future%7==1) {
        System.out.printf("Today is "+day+" and "+next+" day later is Monday.");
    } else if (future%7==2) {
        System.out.printf("Today is "+day+" and "+next+" day later is Tuesday.");
    } else if (future%7==3) {
        System.out.println("Today is "+day+" and "+next+" day later is Wednesday.");
    } else if (future%7==4) {
        System.out.println("Today is "+day+" and "+next+" day later is Thursday.");
    } else if (future%7==5) {
        System.out.println("Today is "+day+" and "+next+" day later is Friday.");
    } else if (future%7==6) {
        System.out.println("Today is "+day+" and "+next+" day later is Saturday.");
    } else {
        System.out.println("Invalid!");
    }
}

}

Answer 1

你的问题＆＃34;是你打印整数，你得到一个数字打印。你可以修复它，例如通过添加函数getDay（day）而不是day。

private String GetDay (int day)
   { 


 if (day == 1)
       {
           return "Sunday";
       }

   return null;


   }


System.out.println("Today is "+GetDay (int day) +" and "+next+" day later is Sunday.");

相同的逻辑适用于下一个整数。

Answer 2

似乎您从不使用星期日到星期六的变量，也不会将天数存储为字符串，而是相应整数的字符串表示形式。因此，您将永远无法打印“星期二”而不是“2”，因为您只需打印变量'day'，即扫描的整数。

您应该存储一个地图并从其整数值中获取String表示。这是一个例子：

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class FindFutureDay {

    private static Map<Integer, String> weekDays = new HashMap<Integer, String>();

    static {
        weekDays.put(0, "Sunday");
        weekDays.put(1, "Monday");
        weekDays.put(2, "Tuesday");
        weekDays.put(3, "Wednesday");
        weekDays.put(4, "Thursday");
        weekDays.put(5, "Friday");
        weekDays.put(6, "Saturday");
   }

   public static void main(String[] args) {
       //Variable
       int day, next, future;

       //Create scanner
       Scanner input = new Scanner(System.in);

       //Input day
       System.out.println("Enter day today: ");
       day = input.nextInt();

       //Input number of days later
       System.out.println("Number of days later: ");
       next = input.nextInt();

       //Close scanner
       input.close();

       //Compute future day
       future = (day + next) % 7;

       //Select result to display
       System.out.println("Today is " + weekDays.get(day) + " and " + next + " day later is " + weekDays.get(future) + ".");
   }
}

希望它有所帮助。

如何在执行后显示整数输入到String？

2 个答案: