Exercise
Count Letters In A File
Objetive
Create a program to count the amount of times that a certain character is inside a file (of any kind).
The file and the letter can be asked to the user or passed as parameters:
count example.txt a
It must display in screen the amount of letters found.
(you can choose any way to interact with the user, showing the proper help)
Example Code
package Counterletters;
import java.util.*;
public class Main
{
public static void main(String[] args)
{
boolean debug = true;
System.out.print("Name of file: ");
String nameFile = new Scanner(System.in).nextLine();
System.out.print("Letter for count: ");
String letter = new Scanner(System.in).nextLine();
java.io.FileReader myfile;
java.io.BufferedReader myfileBufferedReader = new java.io.BufferedReader(myfile);
myfile = new java.io.FileReader(nameFile);
String line;
int countLetter = 0;
do
{
line = myfileBufferedReader.readLine();
if (line != null)
{
for (int i = 0; i < line.length(); i++)
{
if (line.substring(i, i + 1).equals(letter))
{
countLetter++;
}
}
}
} while (line != null);
myfile.close();
System.out.printf("Amount of letter: %1$s" + "\r\n", countLetter);
if (debug)
{
new Scanner(System.in).nextLine();
}
}
}