HACKRANKER CHALLENGE : java end of line

Java End-of-file

"In computing, End Of File (commonly abbreviated EOF) is a condition in a computer operating system where no more data can be read from a data source." — (Wikipedia: End-of-file)

The challenge here is to read n$n$ lines of input until you reach EOF, then number and print all n$n$ lines of content.

Hint: Java's Scanner.hasNext() method is helpful for this problem.

Input Format

Read some unknown n$n$ lines of input from stdin(System.in) until you reach EOF; each line of input contains a non-empty String.

Output Format

For each line, print the line number, followed by a single space, and then the line content received as input:

k This is the line read as input for line number 'k'.

Sample Input

Hello world
I am a file
Read me until end-of-file.

Sample Output

1 Hello world
2 I am a file
3 Read me until end-of-file.

solution:

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int lineNumber= 1;
        while(scan.hasNext())
        { 
            String readLine = scan.nextLine(); 
            System.out.println(lineNumber + " "+ readLine); 
            lineNumber++; 
      
    }
}
}