isAlpha(str) is method converting Persian into Unicode characters and return true

Question

I am trying to get data only in English language.

I tried different methods like:

public static boolean isAlpha(String s){
return s != null && s.matches("^[a-zA-Z]*$");
}

Or StringUtils as:

public static boolean isAlpha(String str){
    return StringUtils.isAlpha(str);
    }

OR using Java:

public static boolean isAlpha(String s){
        if (s == null) {return false;}
 
        for (int i = 0; i < s.length(); i++){
            char c = s.charAt(i);
            if (!(c >= 'A' && c <= 'Z') && !(c >= 'a' && c <= 'z')) {
                return false;
            }
        }
    return true;
    }

Output is: true
I printed the string and found that aforementioned methods are converting Persian String into unicode as: چطوری

Is there anyway to get String of only alphabet letters and spaces?

Make sure you understand how your input is transformed, to confirm that these are indeed XML numeric entities, then look for a solution to unescape/decode these into the proper Unicode characters. — JayK, Apr 08 '21 at 18:09

score 0 · Answer 1 · answered Apr 09 '21 at 17:31

finally the following piece of code fixed my problem:

public static boolean isAlpha(String str){
        boolean isValid = false;
        for (char c : str.toCharArray()) {
            if (!(c >= 'a' && c <= 'z') && !(c >= 'A' && c <= 'Z') && !(c == ' ')) {
                isValid = true;
                break;
            }
        }
    return isValid;
    }

Its only accepting:
a-z (!(c >= 'a' && c <= 'z') or
A-Z !(c >= 'A' && c <= 'Z') and
white spaces !(c == ' '))

Thanks

isAlpha(str) is method converting Persian into Unicode characters and return true

1 Answers1