is there an json simple function to get all the keys from a jsonobject?

Question

I'm trying for the first time to use the jsonsimple library on java. So i formatted a json object using a String. the Object is the following

{
   "mario":{
   "city": "rome",
   "birth": 1980,
  "haircolor": "blonde"
  },
"Lucas": {
  "city": "milan",
  "birth": 1985,
  "haircolor": "brown"
   }
}

From these object i need to get the names in a String format. Thanks everyone for any kinda of help.

`JSONObject` implements `java.util.Map` so you can simply call `myJsonObject.keySet()` — Felix, May 09 '19 at 16:38
@codeflush.dev - would your comment above be better as an answer? :-) — legendofawesomeness, May 09 '19 at 16:40

score 0 · Answer 1 · answered May 09 '19 at 16:44

0

JsonObject implements java.util.Map, so you can simply call the keySet-Method on your JsonObject.

Example:

JsonObject myJsonObject = ...;
Set<String> allNamesInThisObject = myJsonObject.keySet();

answered May 09 '19 at 16:44

Felix

2,256
2
15
35

using that i got that set can't be casted.. But unfortunally i don't know what else do – Andrea Piazza May 18 '19 at 15:56
Why do you want to cast the Set? – Felix May 20 '19 at 11:46

is there an json simple function to get all the keys from a jsonobject?

1 Answers1