Java Program to Check Whether a Given Alphabets are Uppercase or Lowercase or Digits

This is a Java Program to Check if given Alphabets are Uppercase or Lowercase or Digits.

Enter any character as input. After that we match the ASCII value of that character against the given three cases. If that value matches then we get the output accordingly.

Here is the source code of the Java Program to Check if given Alphabets are Uppercase or Lowercase or Digits. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

  1. import;
  2. import;
  3. import;
  4. public class Alphabet_Check 
  5. {
  6.     public static void main(String args[]) throws IOException
  7.     {
  8.         char m;
  9.         BufferedReader bf = new BufferedReader(new InputStreamReader(;
  10.         System.out.print("Enter any alphabet:");
  11.         m = (char);
  12.         if(m >= 97 && m <= 123)
  13.         {
  14.             System.out.println("Lower Case");
  15.         }
  16.         else if(m >= 65 && m <= 96)
  17.         {
  18.             System.out.println("Upper Case");
  19.         }
  20.         else if(m >= 48 && m <= 57)
  21.         {
  22.             System.out.println("Digit");
  23.         }
  24.     }
  25. }


$ javac
$ java Alphabet_Check
Enter any alphabet:B
Upper Case
Enter any alphabet:z
Lower Case
Enter any alphabet:9

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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