Hi where am i making a misstake there ? Please explain someone :c
package pl.codegym.task.task07.task0717;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
/*
Duplikowanie słów
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> lista = new ArrayList<String>();
for(int i = 0; i < 10; i++){
String s = reader.readLine();
lista.add(s);
}
ArrayList<String> wynik = doubleValues(lista);
for(int i = 0; i < lista.size(); i++){
System.out.println(lista.get(i));
}
}
public static ArrayList<String> doubleValues(ArrayList<String> lista) {
for(int i = 0; i < lista.size(); i += 2){
String s = lista.get(i);
lista.add(i,s);
}
return null;
}
}