Why toCharArray() delete space (if the space is the first character)?

Pytania dotyczące zadania

Dyskutowane

I was trying to do this exercise. First I wanted to convert string to table with chars. But here I have to stop because toCharArray () function delete all the spaces in the front of line. How to cope with that?

package pl.codegym.task.task08.task0823; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; /* Ruszamy na cały kraj */ public class Solution { public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String s = reader.readLine(); String newS = ""; char[] literki = s.toCharArray(); for(int i=0;i<literki.length;i++){ System.out.println(literki[i]); } System.out.println(newS); //tutaj wpisz swój kod } }

Komentarze (7)

Popularne
Najnowsze
Najstarsze

Musisz się zalogować, aby dodać komentarz

iNUDiEZ#1996

Poziom 9 , Münster, Germany

12 lutego 2023, 15:56

This solution works without problems. Good luck with analyze it;

Guadalupe Gagnon

Poziom 37 , Tampa, United States

14 października 2022, 14:08

toCharArray() does not trim strings. I don't know where you are coming up with that. Simple test code:

public static void main(String[] args) throws IOException {
   String s = "  this  is a test  ";

   char[] literki = s.toCharArray();
   System.out.println(Arrays.toString(literki));
}

it outputs: [ , , t, h, i, s, , , i, s, , a, , t, e, s, t, , ] which shows all the spaces where they should be.

Tomek

Poziom 20 , Poland

Expert

14 października 2022, 14:33

I was trying this:

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String s = "  reader.readLine";
        String newS = "";
        char[] literki = s.toCharArray();
        for(int i=0;i<literki.length;i++){
            System.out.println(literki[i]);
        }


        //tutaj wpisz swój kod
    }
}

and the result is: r e a d e r . r e a d L i n e

Guadalupe Gagnon

Poziom 37 , Tampa, United States

14 października 2022, 15:49

przydatny

"toCharArray() does not trim strings." is a true statement. I don't know what or where the issue you are experiencing is originating from.

Thomas

Poziom 41 , Bayreuth, Germany

14 października 2022, 16:38

przydatny

for (int i = 0; i < literki.length; i++) {
    System.out.println(i + ": '" + literki[i] + "'");
}
System.out.println(Arrays.toString(literki));

result:

0: ' '
1: ' '
2: 'r'
3: 'e'
4: 'a'
5: 'd'
6: 'e'
7: 'r'
8: '.'
9: 'r'
10: 'e'
11: 'a'
12: 'd'
13: 'L'
14: 'i'
15: 'n'
16: 'e'
[ ,  , r, e, a, d, e, r, ., r, e, a, d, L, i, n, e]

Tomek

Poziom 20 , Poland

Expert

14 października 2022, 18:28

The problem is with online Java environment. This exercise I tried to do online. The results are the other if you do this online and in Intellij Idea. Just have a look.

Thomas

Poziom 41 , Bayreuth, Germany

15 października 2022, 08:48

Maybe the online compiler removes in the output leading empty lines for cosmetic reasons. If you use the code I posted above all should work as expected (at least I guess so). If that's the case you have prove that there's no problem with toCharArray()