CODEWITHSUNDEEP
javaregex
Akshay Talathi
Akshay Talathi

Reputation: 83

Remove whitespace in between the string

I have a string "parent/ child1/ child2". I want to output it as "parent/child1/child2" by removing the white spaces in between.

I am doing in following way. How can I do it using lambda expression?

String absoluteName = "";
for(String name : Parent.getNames.split("/")) {
    if(absoluteName.equals("")) {
       absoluteName = name.trim();
    } else {
       absoluteName += "/" + name.trim();
    }
}

Can't do it using .replaceAll("\\s+", "")) , as in my use case "parent / child1 / child2 " and "pa rent / ch ild1 /ch ild2 " are taken as 2 different values.

Input -> Output

parent / child1 / child2 -> parent/child1/child2

pa rent / ch ild1 / ch ild2 -> pa rent/ch ild1/ch ild2

Upvotes: 0

Views: 694

Answers (1)

Pshemo
Pshemo

Reputation: 124215

You don't need lambdas here. Simply replace / and following space with only / like

str = str.replace("/ ", "/");

or if there can be more spaces after / which you want to get rid of

str = str.replaceAll("/\\s+", "/");

Update: If you want to remove all whitespaces surrounding / you can use

str = str.replaceAll("\\s*/\\s*", "/");

* quantifier allows \\s (whitespace) to appear zero or more times. This means which means "\\s*/\\s*" will match and replace parts like

  • " /", " /",
  • or "/ ", "/ ",
  • or combination of above cases " / ", " / "

It will also match single / but replacing it with same / shouldn't cause any problem.

Upvotes: 4

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