The challenge here is to read n lines of input until you reach EOF, then number and print all n lines of content.
Hint: Java's Scanner.hasNext() method is helpful for this problem.
Input Format
Read some unknown 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.
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.*;
public class Solution {
public static void main(String[] args) {
/* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
Scanner yourInput = new Scanner(System.in);
int noOfLines=1;
while(yourInput.hasNext())
{
String inputString =yourInput.nextLine();
System.out.println(noOfLines+" "+inputString);
noOfLines++;
}
}
}
Result
Code Explanation
The hasNext() is a method of Java Scanner class which returns true if this scanner has another token in its input.
