Hi Pact Team, i need to use matchers for contract verification. so do i need to include matchers in json file? i am unable to understand where to place the matcher statements like some regular expression etc. i am using java.

What have you tried so far?

Here are a number of useful hands-on labs that teach all of the key concepts: https://docs.pactflow.io/docs/workshops and https://docs.pact.io/implementation_guides/workshops

where do we have to write the regular expressions for matchers?

In your test