• Practice using the classes in java.util.regex.

The letter e is the most common letter in the English Dictionary. What would the English language look like without the letter e?

Consider the following starter code:

import java.util.Scanner;

public class WithoutE {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter in a sentence:");
        String input = scanner.nextLine();

        int numberOfEs = findE(input);
        
        if (numberOfEs > 0) {
            String noE = withoutE(input);
            System.out.println("The letter e appeared " + numberOfEs + " times.");
            System.out.println("Here is that sentence without the letter e: " + noE);
            
        } else {
            System.out.println("The letter e was not in the given sentence.");
        }
    }

    public static int findE(String input) {
        // Write your code here!
    }

    public static String withoutE(String input) {
        // Write your code here!
    }
}

In the above code, we want to know if the letter e appears in the user's input. Follow the given instructions and tips:

• Find the number of times the letter e appears in the user's input.
  • This should be case-insensitive, meaning you should count all uppercase and lower case Es and es in a given input.
  • Return the number of times the letter e appeared.
• If the letter e appears in the user's input, replace the user's input without the letter e.
  • Replace all letter es found in the given String object with a space.
  • This should be case-insensitive, meaning you should replace all uppercase and lower case Es and es in a given input.
  • Return the String object with the letter e replaced.
• Use the methods from the Matcher class and the String class to help you.

Here are some example runs of the code for your reference. Make sure your output looks the same when given these values. Also, don't forget to use Regex 101 to help you when needed!

Example Output 1:

Enter in a sentence:
It's as hard as napping without a pillow.
The letter e was not in the given sentence.

Example Output 2:

Enter in a sentence:
Easy peasy lemon squeezy
The letter e appeared 5 times.
Here is that sentence without the letter e:  asy p asy l mon squ  zy

Example Output 3:

Enter in a sentence:
Dreams don't work unless you do
The letter e appeared 2 times.
Here is that sentence without the letter e: Dr ams don't work unl ss you do

Example Output 4:

Enter in a sentence:
EeeEeeEeek!
The letter e appeared 9 times.
Here is that sentence without the letter e:          k!

• Regex 101