Scala read and parse JSON

java, json, scala

Solution

`JSON.parseFull` expects a JSON String, not a path to a file containing such a String. So - you should first load the file and then parse it:

val input_file = "./scala_input.json"
val json_content = scala.io.Source.fromFile(input_file).mkString
val json_data = JSON.parseFull(json_content)
// go on from there...

Problem

I am new to Scala. I have a JSON file, entitled `scala_input.json` containing two items: ``` { "edges_file": "/path/edges.json.gz", "seed_file": "/path/seed.json.gz" } ``` I wish to open the file, parse and attribute two `val` from this file. I have tried: ``` val input_file = "/path/scala_input.json" val json_data = JSON.parseFull(input_file) val edges_file = json_data.get.asInstanceOf[Map[String, Any]]("edges_file").asInstanceOf[String] val seeds_file = json_data.get.asInstanceOf[Map[String, Any]]("seed_file").asInstanceOf[String]] ``` However, this returns `java.util.NoSuchElementException: None.get`. What is it I have not defined? `json_data` and `input_file` are correct and I am sure that `edges_file` and `seed_file` exist.

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