In this program, we are going to see whether a user given character is an alphabet or not. To determine the type of character, we have two different approaches:

  1. Using ASCII value range
  2. Using Character class

See also: Find ASCII value of a character

Using ASCII value range

To check if it is an alphabet or not we only need to check its ASCII value range. If it is an alphabet then it’s ASCII value range should be within 65 (A) – 90 (Z) or 97 (a) – 122 (z).

Program

AlphabetOrNot.javaCopy
import java.util.Scanner;

public class AlphabetOrNot {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.println("Enter any caracter : ");
        char c = scanner.next().charAt(0);

        if((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {

            System.out.println(c + " is A ALPHABET.");

        } else {

            System.out.println(c + " is NOT A ALPHABET.");

        }
    }
}
Try It

Output

Enter any character : x
x IS A ALPHABET.

Using Character class

Java has built-in wrapper class Character available in java.lang package. Here we are using isAlphabetic() static method available in Character class to determine whether the given character is an alphabet or not.

Program

AlphabetOrNot.javaCopy
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.println("Enter any character : ");
        char ch = scanner.next().charAt(0);

        // Using character static method
        if (Character.isAlphabetic(ch)) {
            System.out.println(ch + " IS A ALPHABET.");
        } else {
            System.out.println(ch + " IS NOT A ALPHABET.");
        }
    }
}
Try It

Output

Enter any character : x
x IS A ALPHABET.