Question

Write a JAVA program that prints the contents of a file to the console. On each line, output the line number. Ask the user to specify a file name.

Answer 1

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class PrintFileContents {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter file name: ");
        File file = new File(in.nextLine());
        try {
            Scanner fin = new Scanner(file);
            int lineNumber = 1;
            while (fin.hasNextLine()) {
                System.out.println(lineNumber + ". " + fin.nextLine());
                ++lineNumber;
            }
            fin.close();
        } catch (FileNotFoundException e) {
            System.out.println(file.getAbsolutePath() + " is not found!");
        }
        in.close();
    }
}