Example: Read File with BufferedReader in Java

// Read File with BufferedReader
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        String fileName = "sample.txt"; // Ensure this file exists

        // Step 1: Use try-with-resources for BufferedReader
        try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
            String line;
            // Step 2: Read lines one by one until the end of the file (null)
            while ((line = reader.readLine()) != null) {
                // Step 3: Print each line to the console
                System.out.println(line);
            }
        } catch (IOException e) {
            // Step 4: Handle potential I/O errors (e.g., file not found, read errors)
            System.err.println("Error reading the file '" + fileName + "': " + e.getMessage());
        }
    }
}