Question

Question 1:

Write a Java program that prompts the user to input a file name (existing text file), then calculate and display the numbers of lines in that file. Also calculate and display the length of the longest line in that file. For example, if the input file has the following lines:

Hello

This is the longest line Bye

The output should be:

The file has 3 lines. The longest line is line 2 and it

has 24 characters.

Test your program using the provided files:

./Root/q1.txt

./Root/declaration.txt

./Root/prince.txt

Answer 1

/*If you any query do comment in the comment section else like the solution*/

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException; 
public class ReadFileLineByLine {
        public static void main(String[]args) throws FileNotFoundException {
                File file = new File("Pass Your File name with complete path"); 
                Scanner sc = new Scanner(file);
                int count = 0, maxLength = 0, maxIndex = 0;
                while(sc.hasNextLine()) {
                        String tmp = sc.nextLine();                     
                        if(maxLength < tmp.length()) {
                                maxLength = tmp.length();
                                maxIndex = count + 1;                           
                        }
                        count++;
                }
                sc.close();
                System.out.print("The file has " + count + " lines. ");
                System.out.print("The longest line is line " + maxIndex + " and it has " + maxLength + " characters.");
        }
}