Java - how to convert letters in a string to a number?

Question

I\'m quite new to Java so I am wondering how do you convert a letter in a string to a number e.g. hello world would output as 8 5 12 12 15 23 15 18 12 4

Answer 1

If you need you can use below tested code to convert string into number if your string contains only numbers and alphabets.

 public static Long getNumericReferenceNumber(String str) {

        String result = "";

        for (int i = 0; i < str.length(); i++) {

            char ch = str.charAt(i);

            if (Character.isLetter(ch)) {
                char initialCharacter = Character.isUpperCase(ch) ? 'A' : 'a';
                result = result.concat(String.valueOf((ch - initialCharacter + 1)));
            } else result = result + ch;
        }

        return Long.parseLong(result);
    }