How can I convert JSON to a HashMap using Gson?

Question

I\'m requesting data from a server which returns data in the JSON format. Casting a HashMap into JSON when making the request wasn\'t hard at all but the other way seems to

Answer 1

This is more of addendum to Kevin Dolan's answer than a complete answer, but I was having trouble extracting the type from the Number. This is my solution:

private Object handlePrimitive(JsonPrimitive json) {
  if(json.isBoolean()) {
    return json.getAsBoolean();
  } else if(json.isString())
    return json.getAsString();
  }

  Number num = element.getAsNumber();

  if(num instanceof Integer){
    map.put(fieldName, num.intValue());
  } else if(num instanceof Long){
    map.put(fieldName, num.longValue());
  } else if(num instanceof Float){
    map.put(fieldName, num.floatValue());
  } else {    // Double
     map.put(fieldName, num.doubleValue());
  }
}