LetterCounter.java

//LetterCounter.java

import java.util.Scanner; // Needed for the Scanner class
import java.lang.Character; // Needed for the Character class

/**
 This program will count the number of times a chosen character
 appears in a given String
*/

public class LetterCounter
{
 public static void main(String[] args)
 {
 String userString; // The string provided by the user
 String userStringLower; // The userString lower cased
 char userLetter; // The letter the user would like counted
 char userLetterLower; // The userLetter lower cased
 int i; // The characters of the string
 int appearances = 0; // The number of appearances of the userLetter

 // Create a Scanner
 Scanner keyboard = new Scanner(System.in);

 // Ask the user to enter a String
 System.out.println("Please enter a word or write a sentance " +
 "that you would like to have a letter " +
 "counted for: ");
 userString = keyboard.nextLine();
 System.out.println();

 // Ask the user to provide a letter
 System.out.println("Please provide the letter you would like counted: ");
 userLetter = keyboard.next().charAt(0);
 System.out.println();

 // Convert both inputs to lowercase
 userStringLower = userString.toLowerCase();
 userLetterLower = Character.toLowerCase(userLetter);

 for (i = 0; i < userStringLower.length(); i++)
 {
 if (userStringLower.charAt(i) == userLetterLower)
 {
 appearances++;
 }
 }
 System.out.println("The character " + userLetter + " appears " + appearances + " times.");
 }
}