Check if a particular JSON Object is available or not

Question

I have JSON File as below which has to be dumped into an ArrayList:

{
 \"main1\" : [
  {
     \"child1\" : valueA,
     \"child2\" : valueB,
     \"child3\" : va         


        

Answer 1

getJSONObject("child2");

Will throw an exception if child2 does not exist. Try this instead:

getchild2 = jArray.getJSONObject(j).optJSONObject("child2");

That way you don't have to catch an exception if child2 doesn't exist and can instead check for null.