I got a code that looks like this:

import com.fasterxml.jackson.databind.ObjectMapper

fun main ( args : Array < String > ) {

    val mapper = ObjectMapper()
    val jsonResult = mapper.writerWithDefaultPrettyPrinter()
            .writeValueAsString(someString)

    System.out.println("blank: ${jsonResult.isBlank()}")
    System.out.println("isEmpty: ${jsonResult.isEmpty()}")
    System.out.println("{}: ${jsonResult.contentEquals("{}")}")



}

jsonResult

returns

{}

in my logs which means its a an empty json. How do I check if jsonResult is equals to

{}

(or empty). All of my println returns

false

, so

isEmpty

and

isBlank

dont work.

kt
val someString = "{}"
    val mapper = ObjectMapper()
    val jsonResult = mapper.readTree(someString)
    println(jsonResult.nodeType)
    if(jsonResult is ObjectNode) {
        println(jsonResult.size())
    }

jsonResult.size() == 0

That works, thanks @Nikky