CODEWITHSUNDEEP
java
Mathew Kurian
Mathew Kurian

Reputation: 6039

how to check if a space is followed by a certain character?

I am really confused on this regex things. I have tried to understand it, went no where.

Basically, i am trying to replace all spaces followed by every character but a space to be replaced with "PM".

" sd" " sd"

however

" sd" " sd"

Upvotes: 0

Views: 71

Answers (2)

Simon
Simon

Reputation: 9365

This will replace the space and the following character with "PM":

String s = "123 axy cq23 dasd"; //your string
String newString = s.replaceAll(" [^ ]","PM");

Since I'm not sure if you want to replace only the space or the space and the following character, too, here is a slightly modified version that replaces only the space:

String s = "123 axy cq23 dasd"; //your string
String newString = s.replaceAll(" ([^ ])", "PM$1")

Upvotes: 1

MByD
MByD

Reputation: 137282

You need to use non-capturing pattern:

String res = oldString.replaceAll(" (?:[^ ])", "PM");

Upvotes: 1

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