How to check if a key exists in Json Object and get its value [duplicate]

Question

Let say this is my JSON Object

{   "LabelData": {     "slogan": "AWAKEN YOUR SENSES",     "jobsearch": "JOB SEARCH",     "contact": "CONTACT",     "video": "ENCHANTING BEACHSCAPES",     "createprofile": "CREATE PROFILE"   } } 

I need to know that either 'video` exists or not in this Object, and if it exists i need to get the value of this key. I have tried following, but i am unable to get value of this key.

 containerObject= new JSONObject(container);  if(containerObject.hasKey("video")){   //get Value of video } 

Answer 1

Use below code to find key is exist or not in JsonObject. has("key") method is used to find keys in JsonObject.

containerObject = new JSONObject(container); //has method if (containerObject.has("video")) {     //get Value of video     String video = containerObject.optString("video"); } 

If you are using optString("key") method to get String value then don't worry about keys are existing or not in the JsonObject.

Answer 2

Use:

if (containerObject.has("video")) {     //get value of video }