CODEWITHSUNDEEP
javaregex
Alpaslan
Alpaslan

Reputation: 233

Deleting whitespaces before a certain characters with regex

Say, I have a string like the first line and I need to convert it to the second line.

"English       ,Spanish         ,Eastern Japanese          "
"English,Spanish,Eastern Japanese"

As you see, there are several whitespaces before commas, but each element may have spaces between its variables, too (like "Eastern Japanese"). So, all I need is to delete multiple whitespaces coming before commas. I can trim the last occuring whitespaces before using replaceAll() method, that is no problem.

Upvotes: 0

Views: 70

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626845

You can remove excessive spaces with replaceAll:

  String s = "English      ,Spanish".replaceAll("\\s+,",",");

See IDEONE demo

Or with trim():

System.out.println("English      ,Spanish    ".replaceAll("\\s+,",",").trim());

Another demo

And another hint: if there are spaces to trim after ,, add \\s* after , in the pattern:

.replaceAll("\\s+,\\s*",",")

Upvotes: 7

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