Question

Write a program that asks the user to enter the name of a file, and then asks the user to enter a character. The program should count and display the number of times that the specified character appears in the file. Use Notepad or another text editor to create a sample file that can be used to test the program.

Sample Run
java FileLetterCounter
Enter file name: wc4↵
Enter character to count: 0↵
The character '0' appears in the file wc4 17times.↵

Answer 1

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;


public class FileLetterCounter {

        public static void main(String[] args) throws IOException {
                Scanner in = new Scanner(System.in);

                System.out.println("Enter file name: ");
                String fileName = in.nextLine();

                System.out.println("Enter character to count: ");
                char ch = in.nextLine().charAt(0);

                int c, count = 0;
                BufferedReader br = new BufferedReader(new FileReader(fileName));
                while ((c = br.read()) != -1) {
                        if (ch == (char) c) {
                                count++;
                        }
                }
                System.out.println("The character appears in the file " + count + " times.");

                in.close();
        }
}

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