How to add a key,value pair to JObject using json4s in Scala?

Question

I parse json using json4s library: GitHub json4s

I have a empty JObject:

val json = JObject()

how to add key,value pair to JObject?

Answer 1

import org.json4s.JsonDSL._
json ~ ("foo" -> "bar")

or

json merge JObject("foo" -> JString("bar"))