Replacing whitespaces on a String and breaking them using toCharArray() doesn't seem to work

Question

I tried to do some String manipulation to play around with the methods available and I noticed that when I used the replaceAll("\\s+","") method to remove whitespaces in a String, it failed to do it.

System.out.print("Enter a word: ");
String word = scanner.next();
String cleansed = word.replaceAll("\\s+","");
char[] letters = cleansed.toCharArray();
for(char c : letters){
    System.out.print(c+" ");
}

When I go to the console and do something like,

Enter a word : I am entering some word.

The output I get on the console is I which seems to be dropping all other String values after the space.

What am I missing here?

I play around with different methods when there's nothing to do. So right now I just wonder why it's not working as expected.

I'd appreciate any help.

Thank you.

Can't reproduce. Maybe you tested with different content. Although it doesn't work as you expect anyway... Note that NOT all String.replace* methods take a regex... — ernest_k
– ernest_k, Commented May 3, 2018 at 5:26
I see you used replace("\\s+","") but you mentioned replaceAll("\\s+","") — Deepak Sharma
– Deepak Sharma, Commented May 3, 2018 at 5:27
@DeepakSharma I edited the question. I'm using the latter which is replaceAll("\\s+",""); — heisenberg
– heisenberg, Commented May 3, 2018 at 5:33

Naveen Kumar · Accepted Answer · 2018-05-03 05:34:01Z

2

You should use scanner.nextLine() instead of scanner.next(). Also use word.replaceAll() instead of word.replace()

Here is the working code:

import java.util.Scanner;

public class Example {
    public static void main(String[] a) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a word: ");
        String word = scanner.nextLine();
        String cleansed = word.replace("\\s+","");
        char[] letters = cleansed.toCharArray();
        for(char c : letters){
            System.out.print(c+" ");
        }
    }
}

The output will be:

Enter a word: Enter a word : I am entering some word.
E n t e r a w o r d : I a m e n t e r i n g s o m e w o r d .

answered May 3, 2018 at 5:34

Naveen Kumar

9831 gold badge14 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

heisenberg Over a year ago

Thanks. I failed to notice that at first. The code actually comes with other code blocks prior to this which is using the scanner methods next(), nextLine(). I suspect that the next() and nextLine() and nextInt() methods are getting mixed up since I'm using one scanner object.

cloudiebro · Accepted Answer · 2018-05-03 05:40:01Z

0

try this

System.out.print("Enter a word: ");
String word = scanner.next();
word = word.replaceAll(" ","");
char letters [] = word.toCharArray();
for(char c : letters){
    System.out.print(c+" ");
}

answered May 3, 2018 at 5:40

cloudiebro

1631 gold badge3 silver badges14 bronze badges

Collectives™ on Stack Overflow

Replacing whitespaces on a String and breaking them using toCharArray() doesn't seem to work

2 Answers 2

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related