I don't understand why this isn't correct I am getting the right output.
package com.codegym.task.task07.task0717;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
/*
Duplicating words
*/
public class Solution {
public static void main(String[] args) throws Exception {
// Read strings from the console and declare an ArrayList here
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> words = new ArrayList<String>();
for(int i = 0; i < 10; i++){
words.add(reader.readLine());
}
ArrayList<String> result = doubleValues(words);
// Display result
for (int i = 0; i < words.size(); i++){
System.out.println(words.get(i));
}
}
public static ArrayList<String> doubleValues(ArrayList<String> list) {
//write your code here
for(int i = 0; i < list.size();){
list.add(i+1, list.get(i));
i += 2;
}
return null;
}
}