Question

//Your programs should not crash under any circumstances.

import java.util.Scanner;

public class LetterCount
{

  public static int countBs(String word)
  {
    for (int i = 0; i < word.length(); i++)
    {
      int counter = 0;
      if ((word.charAt(i) == 'b') || (word.charAt(i) == 'B'))
      {
        counter++;
      }
    }
    return counter;
  }

  public static void main(String[] args)
  {
    Scanner in = new Scanner(System.in);
    System.out.printf("Please enter a word: ");
    String str = in.next();

    int result = countBs(str);
    System.out.printf("%s contains letter B %d times.\n", str, result);
  }
}

The program above is an INCORRECT attempt to write a program that:

• Asks the user to enter a word.
• Prints out the number of occurrences of the letter B (both upper and lower case) in that word.

In a file called LetterCount.java, modify the above program so that it works correctly.

IMPORTANT: You are NOT allowed to modify in any way the main function.

Your programs should not crash under any circumstances.

For example: if the user enters "Babylon", your program output should look EXACTLY like this:

Please enter a word: Babylon
Babylon contains letter B 2 times.

As another example: if the user enters "airplane", your program output should look EXACTLY like this:

Please enter a word: airplane
airplane contains letter B 0 times.

As another example: if the user enters "$%^AaBb1234", your program output should look EXACTLY like this:

Please enter a word: $%^AaBb1234
airplane contains letter B 2 times.

Answer 1

import java.util.Scanner;

public class LetterCount {

    public static int countBs(String word) {
        int counter = 0;
        for (int i = 0; i < word.length(); i++) {
            if ((word.charAt(i) == 'b') || (word.charAt(i) == 'B')) {
                counter++;
            }
        }
        return counter;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Please enter a word: ");
        String str = in.next();
        int result = countBs(str);
        System.out.printf("%s contains letter B %d times.\n", str, result);
    }
}