Answers for "how to check if a character is alphanumeric in java"

3

how to check if a char is a letter java

Character.isDigit(string.charAt(index)) //(JavaDoc) will return true if it's a digit
Character.isLetter(string.charAt(index)) //(JavaDoc) will return true if it's a letter
Posted by: Guest on July-27-2020
0

check character is alphanumeric java

javaCopypublic class CheckCharAlpha {
    public static void main(String[] args) {

        boolean letterOrDigit = isAlphaNumeric('k');
        System.out.println(letterOrDigit);
    }

    public static boolean isAlphaNumeric(char char1) {
        return (char1 >= 'a' && char1 <= 'z') || (char1 >= 'A' && char1 <= 'Z') || (char1 >= '0' && char1 <= '9');
    }
}
Posted by: Guest on June-27-2021

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