Was muss ich ändern?
package de.codegym.task.task07.task0717;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
/*
Wörter duplizieren
*/
public class Solution {
public static void main(String[] args) throws Exception {
ArrayList<String> liste = new ArrayList<String>();
for (int i= 0; i < 10; i++){
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String s = reader.readLine();
liste.add(s);
}
ArrayList<String> ergebnis = werteVerdoppeln(liste);
for (int i= 0; i < liste.size(); i++){
System.out.println(liste.get(i));
}
}
public static ArrayList<String> werteVerdoppeln(ArrayList<String> liste) {
for (int i= 0; i < 20; i += 2){
liste.add(i, liste.get(i));
}
return liste;
}
}