How to Check if a character is alphabet or not in Java
By Abhishek Naik BhukyaIn this tutorial, we will learn how to Check if a Character is an alphabet or not in the Java programming language with some cool and easy examples.
Here we have some easy and efficient methods to find out.
Check if a character is an alphabet or not in Java
Here I am going to describe it in two different methods.
1. Using Predefined Method:
Easier and readable. The Character.isAlphabetic() method abstracts away the complexity and immediately provides the result.
import java.util.*;
public class AlphabetCheck {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
//Enter a character to take a single character as an input
System.out.print("Enter a single character: ");
String input = scanner.next();
if (input.length() != 1) {
System.out.println("Please enter exactly one character.");
} else {
char ch = input.charAt(0);
// Check if the given input character is an alphabet or not
if (Character.isAlphabetic(ch)) {
System.out.println(ch + " is an alphabet.");
} else {
System.out.println(ch + " is not an alphabet.");
}
}
scanner.close();
}
}
Output:
Enter a single character: Y Y is an alphabet.
Explanation: The Character class isAlphabetic method in Java checks if a specified character is an alphabet.
2. Using ASCII Range:
You could manually look at if the character belongs in the ASCII variety of lowercase letters (‘a’ to ‘z’) or uppercase letters (‘A’ to ‘Z’).
import java.util.*;
public class AlphabetCheck {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
//Enter a character to take a single character as an input
System.out.print("Enter a single character: ");
String input = scanner.next();
if (input.length() != 1) {
System.out.println("Please enter exactly one character.");
} else {
char ch = input.charAt(0);
// Check if the given input character is an alphabet or not
if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) {
System.out.println(ch + " is an alphabet.");
} else {
System.out.println(ch + " is not an alphabet.");
}
}
scanner.close();
}
}
Output:
Enter a single character: n n is an alphabet.
Explanation: This method Checks if the character belongs to the ASCII range of lowercase (a-z) or uppercase (A-Z) letters.
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