Write a Java program to count words, characters, and lines in a text file using BufferedReader.

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

public class WordCountInFile {
    public static void main(String[] args) {
        BufferedReader reader = null;

        // Initialize counters to 0
        int charCount = 0;
        int wordCount = 0;
        int lineCount = 0;

        try {
            // Creating BufferedReader object to read the file
            reader = new BufferedReader(
                new FileReader("C:\\SeleniumPractice\\Test.txt"));

            // Reading the first line
            String currentLine = reader.readLine();

            while (currentLine != null) {
                // Increment line count for each line read
                lineCount++;

                // Split line by spaces to get words
                String[] words = currentLine.split(" ");

                // Add word count for this line
                wordCount = wordCount + words.length;

                // Iterate each word to count characters
                for (String word : words) {
                    charCount = charCount + word.length();
                }

                // Read next line
                currentLine = reader.readLine();
            }

            System.out.println("Number Of Chars In A File : " + charCount);
            System.out.println("Number Of Words In A File : " + wordCount);
            System.out.println("Number Of Lines In A File : " + lineCount);

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // Always close reader in finally block
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

Number Of Chars In A File : 142
Number Of Words In A File : 28
Number Of Lines In A File : 5

import java.io.*;
import java.nio.file.*;

// Auto-closes reader — no need for finally block
try (BufferedReader reader = new BufferedReader(new FileReader("Test.txt"))) {
    int lineCount = 0, wordCount = 0, charCount = 0;
    String line;

    while ((line = reader.readLine()) != null) {
        lineCount++;
        String[] words = line.trim().split("\\s+");
        wordCount += words.length;
        for (String w : words) charCount += w.length();
    }

    System.out.println("Lines: " + lineCount);
    System.out.println("Words: " + wordCount);
    System.out.println("Chars: " + charCount);
}

import java.nio.file.*;
import java.util.*;

Path path = Paths.get("Test.txt");
List<String> lines = Files.readAllLines(path);

long lineCount = lines.size();
long wordCount = lines.stream()
    .flatMap(l -> Arrays.stream(l.trim().split("\\s+")))
    .count();
long charCount = lines.stream()
    .flatMap(l -> Arrays.stream(l.trim().split("\\s+")))
    .mapToLong(String::length).sum();

System.out.println("Lines: " + lineCount);
System.out.println("Words: " + wordCount);
System.out.println("Chars: " + charCount);

// Read test data from a CSV file for data-driven testing
try (BufferedReader br = new BufferedReader(new FileReader("testdata.csv"))) {
    String line;
    while ((line = br.readLine()) != null) {
        String[] data = line.split(",");
        String username = data[0];
        String password = data[1];
        // run test with each username/password pair
        performLogin(username, password);
    }
}