Pattern is not splitting as desired, fails to split by +

Question

I have the following code :

Pattern pattern = Pattern.compile(\"\\\\d+(?:\\\\.\\\\d+)?(\\\\s\\\\d+(?:\\\\.\\\\d+)?)*\\\\s*[-\\\\+\\\\*/\\\\$£]\");

String input          


        

Answer 1

You can use this regex:

((?:\d+(?:\.\d+)?(?:\s+\d+(?:\.\d+)?)*)?\s*[-+*/$£])

RegEx Demo

In Java it would be:

Pattern pattern = Pattern.compile
  ( "((?:\\d+(?:\\.\\d+)?(?:\\s+\\d+(?:\\.\\d+)?)*)?\\s*[-+*/$£])" );