Java: Find the sequences of one upper case letter followed by lower case letters

Last update on May 24 2025 12:59:40 (UTC/GMT +8 hours)

4. Match Uppercase Followed by Lowercase

Write a Java program to find the sequence of one upper case letter followed by lower case letters.

Sample Solution:

Java Code:

import java.util.Scanner;
public class Main {
   public static void main(String[] args) {
	  
	    System.out.println(validate("Java"));
	    System.out.println(validate("java"));
	    System.out.println(validate("javA"));
	    System.out.println(validate("JAVa"));
      System.out.println(validate("Ja"));
      System.out.println(validate("aJ"));		
        }
   public static String validate(String text) {
	   if (text.matches("[A-Z][a-z]+$"))
                return "Found a match!";
       else
                return "Not matched!";
   }
}

Sample Output:

Found a match!
Not matched!
Not matched!
Not matched!
Found a match!
Not matched!

Pictorial Presentation:

Flowchart :

For more Practice: Solve these Related Problems:

• Write a Java program to extract all substrings that start with a single uppercase letter followed by one or more lowercase letters.
• Write a Java program to verify if a given word is capitalized properly with one uppercase followed by lowercase letters.
• Write a Java program to list all words from a paragraph that match the uppercase-lowercase pattern using regex.
• Write a Java program to implement a method that filters out words not following the pattern of one uppercase followed by only lowercase letters.

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