Hackerrank Java End-of-file Solution
Poor Man
- Published
- Updated
- Reading time
- 1 min read
- Length
- 227 words
"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 lines of input until you reach EOF, then number and print all lines of content.
Hint: Java's Scanner.hasNext() method is helpful for this problem.
Input Format
Read some unknown 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
Text
Hello world
I am a file
Read me until end-of-file.Sample Output
Text
1 Hello world
2 I am a file
3 Read me until end-of-file.Solution in java8#
Approach 1.
Approach 2.
Python
import java.io.*;
import java.util.*;
public class Solution {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int i = 0;
while (sc.hasNextLine()) {
System.out.println(++i + " " + sc.nextLine());
}
}
}Approach 3.
Python
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 scanner = new Scanner(System.in);
for(int i =1; scanner.hasNext(); i++){
System.out.println(i+" "+scanner.nextLine());
}
}
}
