I am using the latest okhttp version: okhttp-2.3.0.jar
How to add query parameters to GET request in okhttp in java ?
I found a related ques
As mentioned in the other answer, okhttp v2.4 offers new functionality that does make this possible.
See http://square.github.io/okhttp/2.x/okhttp/com/squareup/okhttp/HttpUrl.Builder.html#addQueryParameter-java.lang.String-java.lang.String-
This is not possible with the current version of okhttp, there is no method provided that will handle this for you.
The next best thing is building an url string or an URL object (found in java.net.URL) with the query included yourself, and pass that to the request builder of okhttp.

As you can see, the Request.Builder can take either a String or an URL.
Examples on how to build an url can be found at What is the idiomatic way to compose a URL or URI in Java?