Doubt on requirements

Pregunta sobre la tarea

To the top of the list

Sintaxis de Java, Nivel 7, Lección 6

En discusión

What it means "The program should add lines to the beginnig of the list"? I don´t understand it.

package com.codegym.task.task07.task0710; import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.ArrayList; /* To the top of the list */ public class Solution { public static void main(String[] args) throws Exception { //write your code here ArrayList<String> list = new ArrayList<String>(); // Populating the array BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); int i; for(i=0; i<10; i++){ list.add(i, reader.readLine()); } // Displaying the content of the array i=list.size()-1; do{ System.out.println(list.get(i)); i--; }while(i>=0); } }

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Guadalupe Gagnon

Nivel 37 , Tampa, United States

30 octubre 2021, 20:57

Lets say you had three Strings: "one", "two", "three" Say you enter them one at a time and have them added to a list: - so you enter "one" and the list will be ["one"] - then you enter "two" and the list will be ["one", "two"] - then you enter "three" and the list will be ["one", "two", "three"] That would be the default way to add them to a list using the add() method. This task wants you to add them to the beginning instead: - so you enter "one" and the list will be ["one"] - then you enter "two" and the list will be ["two", "one"] ("two" is added to the front of the list) - then you enter "three" and the list will be ["three", "two", "one"] ("three" is added to the front of the list)