Given a array with a blank element how do I print all elements except the blank one?

Question

I have a array of chars called votacoes. And when I do:

for (int i = 0; i < nDeputados; i++) {
    System.out.println(votacoes[i]);
}

the output is:

S
A

S
S
S
N
A

As you can see you there is a blank char in index 2.

To print everything except the blank char what is the condition in the following if?

for (int i = 0; i < nDeputados; i++) {
    if(???????????){
        System.out.println(votacoes[i]);
    }
}

What is `votacoes`? What does `votacoes[i]` return? What does "empty element" means? (empty String, blank String...) — Tunaki, Nov 28 '15 at 18:38
Fixed my answer, will work for char[]. You should have given those details earlier. — Jaskaranbir Singh, Nov 28 '15 at 18:39

Jaskaranbir Singh · Answer 1 · 2015-11-28T20:08:54.240

0

for (int i = 0; i < nDeputados; i++) {
    if(!String.valueOf(votacoes[i]).matches("\\s")){
        System.out.println(votacoes[i]);
    }
}

This will skip up any type of space characters and print out a continuous output.

edited Nov 28 '15 at 20:08

answered Nov 28 '15 at 18:25

Jaskaranbir Singh

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If you are downvoting you should also provide a reason for that. – Jaskaranbir Singh Nov 28 '15 at 18:33
Now that you have edited your answer to use char[] instead of only strings, this line doesn't make sense: `if(!String.valueOf(votacoes[i]).equals(""))` Since votacoes[i] is a char, it will always have length of 1 and so will never be "". By the way, you should call String.isEmpty() rather than equals(""). – Klitos Kyriacou Nov 28 '15 at 19:58
Yup, you are right. Code "Trimmed". And I use `""` because you dont have to check for `null` in that. So it does work fine for me in a lot of situations... but yeah, `.equals()` is cleaner and actually does a good `null` check too. – Jaskaranbir Singh Nov 28 '15 at 20:09

score 0 · Answer 2 · answered Nov 28 '15 at 18:27

You can use String isBlank method:

for (int i = 0; i < nDeputados; i++) {
    if(!StringUtils.isBlank(votacoes[i])){
    System.out.println(votacoes[i]);
    }
}

Look here: http://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringUtils.html#isBlank%28java.lang.String%29

score -1 · Accepted Answer · answered Nov 28 '15 at 18:40

-1

for (int i = 0; i < nDeputados; i++)
{
 if(Character.isAlphabetic(votacoes[i]))

      System.out.println(votacoes[i]);
}

The Character.isAlphabetic() method returns true if the value passed is an alphabet. Hope this helps :)

answered Nov 28 '15 at 18:40

persistent_poltergeist

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Who said OP didn't want to print `-`? Only "empty elements" are mentioned. – Tunaki Nov 28 '15 at 18:41
@Tunaki you are right. now why didn't i think about that – persistent_poltergeist Nov 28 '15 at 18:45
Thanks so much. This works like a charm and my algorithm is now fully working thanks to you! – Claudio Vasconcelos Nov 28 '15 at 18:47
@Tunaki , in this case it works because my array can only have Alphabetic characters – Claudio Vasconcelos Nov 28 '15 at 18:48
@Tunaki Thanks, from now on i will try to understand question much more clearly :) – persistent_poltergeist Nov 28 '15 at 18:50

score -1 · Answer 4 · answered Nov 28 '15 at 18:44

-1

use this code

      for (int k = 0; k < votacoes.length; k++) {
        if (votacoes[k]==' ') {
            k++;
        }
        System.out.println(votacoes[k]);

hope it would work for you..

answered Nov 28 '15 at 18:44

Shivam Jaiswal

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Which gives a nice `ArrayIndexOutOfBoundsException` if the last character is a space. – Tunaki Nov 28 '15 at 18:46
@Tunaki Ohh that's right, it was just slipped from my mind, thanks `Character.isAlphabetic(array[k])` would be perfect here as I know – Shivam Jaiswal Nov 29 '15 at 10:42

score -1 · Answer 5 · edited Nov 28 '15 at 19:51

-1

char[] votacoes = {'S','A',' ','S','S','S','N','A'};
for (char b : votacoes) {
    if(!Character.isWhitespace(b)) {
        System.out.println(b);
    }
}

edited Nov 28 '15 at 19:51

Sruit A.Suk

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answered Nov 28 '15 at 18:47

Madushan Perera

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Given a array with a blank element how do I print all elements except the blank one?

5 Answers5