to search for numeric or alphanumeric strings before or after some keywords in java

Question

How to find numeric or alphanumeric strings before or after some keywords in a string in java using stanford corenlp.

Situation: I need to extract codes which are a string containing only digits or digits+alphabets or digits + special characters like '*' or '#' from sentences containing some predefined keywords.The codes can be anywhere before or after the keywords.

I am a beginner in NLP and need help on this.

Answer 1

You can use the following:

(?<=(keyword1|keyword2))\\s+([a-zA-Z0-9*#]+)|([a-zA-Z0-9*#]+)\\s+(?=(keyword1|keyword2))