在 java 中的每个单词之间添加空格

Question

I have a string that could look like this where there could be one or more spaces in between the words and this is just a sample of it

JAVA CODE STYLING AND RESOURCES

How can I insert/append white spaces in between every word using java to achieve this result

JAVA   CODE  STYLING  AND  RESOURCES

from the above u can see that additional white spaces was added because there is a space already after the words except the last.

On my own, I have attempted and all I could arrive is adding spaces after every character instead of words having one or more white spaces

Answer 1

Strictly speaking, if you really only want to add a space to a space which already exists in between words, you can match on the following regex pattern:

(?<=\w)([ ]+)(?=\w)

And then replace with the captured spaces along with one additional space. Here is a sample script:

String input = "JAVA CODE STYLING AND RESOURCES";
String output = input.replaceAll("(?<=\\w)([ ]+)(?=\\w)", "$1 ");
System.out.println(input);  // JAVA CODE STYLING AND RESOURCES
System.out.println(output); // JAVA  CODE  STYLING  AND  RESOURCES

Answer 2

You can use replace() method:

String s1 = "JAVA CODE STYLING AND RESOURCES";
String s2 = s1.replace(" ", "  "); //replaces all occurrences of " " to "  "  
// s2 is now: "JAVA  CODE  STYLING  AND  RESOURCES"

Answer 3

Answer from @Bug is probably the best, I can offer the most simple one:

String string = "JAVA CODE STYLING AND RESOURCES";
String[] words = string.split(" ");
for (int i = 0; i < words.length-1; i++) {
    words[i] = words[i]+"  ";
}

Answer 4

I would suggest to do it like this.

public class ReplaceExample1{
        public static void main(String[] args){
            String s1 = "JAVA CODE STYLING AND RESOURCES";
            String replaceString = s1.replace(" ", "  ");//replaces all occurrences of ' ' to '  '
            System.out.println(replaceString);
        }
    }