Converting String Letters to Numbers

[Kiyoji Fukunaga]

Hello I am new to Java programming and I am having a hard time on converting letters to numbers, what I want my program to happen is that for example a person types a string "I am Happy" then the output would be numbers, but in reverse for example "25-16-16-1-8013-109" include the - from the output, also the output is like that because the letters are suppose to have corresponding values example A = 1 B = 2 and so on. I = 9, space =0, A = 1, M = 13, space = 0, H = 8, A = 1, P = 16, P = 16, Y = 25. I think I almost got the code, but for some reason new problems occur and that is A and a should have the same values 1 uppercase and lowercase also how do I add the - and make sure that whenever there is a space the - would not occur same as 109 and 8013. Anyways here is the code I hope someone can help me and at the least give me advices and tips, we are allowed to have 1 main method and 2 user defined methods.

import java.util.*;
public class New3
{
    public static void main(String[] args) {

    Scanner input = new Scanner(System.in);
    System.out.print("Input the First string: ");
    String fs = input.nextLine();
    
    System.out.println(fs);
    
    
    int num = fs.charAt(0) - 'A' + 1;
    for (char c : fs.toCharArray())
    {
        int num1 = charToCode(c);
        System.out.print(num1 + "-");
    }

    }
    
    public static int charToCode(char c) throws IllegalArgumentException
    {
        if (c == ' ') return 0;
        if (c >= 'A' && c <= 'Z') return c - 'A' + 1;
        throw new IllegalArgumentException(
        "Only spaces and capital letters are allowed");
    }
}

[Campbell Ritchie]

Welcome to the Ranch

Thank you for using the code button, but you didn't quite get it right; the [/code] part goes after the code, but I have corrected it, and doesn&aops;t it look better now

You aren't far off.
Make the names of your code reflect what they do; New3 will mean nothing to you after next week
What does line 13 mean? I think you can delete that line without noticing anything.
Look at this loop, which is the standard way to traverse an array backwards:-

for (int i = myArray.length - 1; i >= 0; i--)
{
   ...myArray[i]...
}

Yes, you do need the slightly awkward syntax but that loop will definitely work for arrays of any size.
Find out what happens if you print escape characters:

System.out.println("\b");

The subtraction will work, but consider using the % remainder operator instead of subtraction. I shall let you work out what to do. I can make that technique work for letters in English, but will fail to allocate numbers correctly for German, French, Spanish, etc.
Please indent your code correctly; lines 24‑27 are a good example of how not to do it, I am afraid. Always use {} after if.