How to create in Java solution just with "switch and if" such an input "January " or "janUARY"

Question

How to create in Java solution just with "switch and if" such an input "January", "january", JANUARY", janUARY" and any other combination of case is treated as "January" and in all cases prints out 1. I did program, but it is working just with the same input words, maybe exist a trick to resolve that.

import java.util.Scanner;
    public class nameMonth
    {

       public static void main(String[] args)

       {
          String month;
          int nrMonth;

      Scanner keyboard = new Scanner(System.in);
      System.out.println("Enter a month");
      month = keyboard.nextLine();
      switch (month)
      {
         case "January":
            System.out.println("Your month is January");
            nrMonth = 1;
            break;

         case "February":
            System.out.println("Your month is February");
            nrMonth = 2;
            break;

         case "March":
            System.out.println("Your month is March");
            nrMonth = 3;
            break;

         case "April":
            System.out.println("Your month is April");
            nrMonth = 4;
            break;

         case "May":
            System.out.println("Your month is May");
            nrMonth = 5;
            break;

         case "June":
            System.out.println("Your month is June");
            nrMonth = 6;
            break;

         case "July":
            System.out.println("Your month is July");
            nrMonth = 7;
            break;

         case "August":
            System.out.println("Your month is August");
            nrMonth = 8;
            break;

         case "September":
            System.out.println("Your month is September");
            nrMonth = 9;
            break;

         case "October":
            System.out.println("Your month is October");
            nrMonth = 10;
            break;

         case "November":
            System.out.println("Your month is November");
            nrMonth = 11;
            break;

         case "December":
            System.out.println("Your month is December");
            nrMonth = 12;
            break;

         default:
            System.err.println("Your month is wrong");
            break;
      }
   }

}

score 3 · Accepted Answer · answered Oct 16 '18 at 19:45

3

Use this:

switch (month.toUpperCase()) {

Then, the cases should be in uppercase, such as:

    case "JANUARY":
        System.out.println("Your month is January");
        nrMonth = 1;
        break;

answered Oct 16 '18 at 19:45

Chai T. Rex

2,972
1
15
33

score 1 · Answer 2 · answered Oct 16 '18 at 19:54

Unless you're required to use a switch for some reason, you could do something like this:

private int getMonthInYear(string month) {    
    string[] monthsInYear = {"JANUARY", "FEBRUARY", "MARCH", "APRIL", ..., "DECEMBER" };

    for (int i = 0; i < monthsInYear.length; i++) {
        if (monthsInYear[i].equalsIgnoreCase(month))
            return i+1; // Compensate for 0 indexing
    }    
    return -1; // In case it's not found
}

Then just call this method in your main. In general, sounds like you're looking for the equalsIgnoreCase(string s) string function or something similar.

Good example with loop for – Dima Bors Oct 16 '18 at 19:57 — Dima Bors, Oct 16 '18 at 19:57

score 0 · Answer 3 · 2018-10-16T20:23:59.120

0

You can do this.

      String month;
      int nrMonth;
      month.toUpperCase(); // Convert to Upper Case.

  Scanner keyboard = new Scanner(System.in);
  System.out.println("Enter a month");
  month = keyboard.nextLine();
  switch (month)
  {
     case "JANUARY": //Change all to caps.
        System.out.println("Your month is January");
        nrMonth = 1;
        break;

///ETC...

edited Oct 16 '18 at 20:23

answered Oct 16 '18 at 19:46

1

btw: `month.ToUpperCase()` should be `month.toUpperCase()` ... it's Java not C# ;) – LuCio Oct 16 '18 at 20:21

score 0 · Answer 4 · answered Oct 16 '18 at 19:57

0

You can use this

String withCase = month.substring(0, 1).toUpperCase()+month.substring(1).toLowerCase();

switch (withCase) {
  case "January":
    System.out.println("Your month is January");
    nrMonth = 1;
    break;

answered Oct 16 '18 at 19:57

user12222

33
6

Would probably be smoother to just uppercase or lowercase everything. – Grey Haven Oct 16 '18 at 20:04

score 0 · Answer 5 · answered Oct 16 '18 at 20:00

You can do this

import java.util.Scanner;
public class nameMonth {

   public static void main(String[] args) {
       String month;
       int nrMonth;

       Scanner keyboard = new Scanner(System.in);
       System.out.println("Enter a month");
       month = keyboard.nextLine();

       if("January".equalsIgnoreCase(month)) {
          System.out.println("Your month is January");
          nrMonth = 1;
       }
       else if("February".equalsIgnoreCase(month)) {
          System.out.println("Your month is February");
          nrMonth = 2;
       }
       else if("March".equalsIgnoreCase(month)) {
          System.out.println("Your month is March");
          nrMonth = 3;
       }
       else if("April".equalsIgnoreCase(month)) {
          System.out.println("Your month is April");
          nrMonth = 4;
       }
       else if("May".equalsIgnoreCase(month)) {
          System.out.println("Your month is May");
          nrMonth = 5;
       }
       else if("June".equalsIgnoreCase(month)) {
          System.out.println("Your month is June");
          nrMonth = 6;
       }
       else if("July".equalsIgnoreCase(month)) {
          System.out.println("Your month is July");
          nrMonth = 7;
       }
       else if("August".equalsIgnoreCase(month)) {
          System.out.println("Your month is August");
          nrMonth = 8;
       }
       else if("September".equalsIgnoreCase(month)) {
          System.out.println("Your month is September");
          nrMonth = 9;
       }
       else if("October".equalsIgnoreCase(month)) {
          System.out.println("Your month is October");
          nrMonth = 10;
       }
       else if("November".equalsIgnoreCase(month)) {
          System.out.println("Your month is November");
          nrMonth = 11;
       }
       else if("December".equalsIgnoreCase(month)) {
          System.out.println("Your month is December");
          nrMonth = 12;
       }
       else {
          System.err.println("Your month is wrong");
       }  
   }
 }

score 0 · Answer 6 · answered Oct 16 '18 at 20:03

0

You can simply use this line of code at the beginning (right below month = keyboard.nextLine();) and you will not have to change anything in your code.

month = month.substring(0,1).toUpperCase().concat(month.substring(1).toLowerCase());

answered Oct 16 '18 at 20:03

Rarblack

4,559
4
22
33

How to create in Java solution just with "switch and if" such an input "January " or "janUARY"

6 Answers6