Compare two array of different length

Here is the code to compare two json array and add to one
conside
notiarray is a json array with json length 10
jarray is a json array with json length 5

boolean found;  

int i=0;

for ( i = 0; i < notiarray.length(); i++)

{

  found = false;

  for (int k = 0; k < jarray.length(); k++){

      if(notiarray.getJSONObject(i).getString("notification_id").equalsIgnoreCase(jarray.getJSONObject(k).getString("key")))

      {

        System.out.println(jarray.getJSONObject(k).getString("key")+ " is equal to " + notiarray.getJSONObject(i).getString("notification_id"));

        found = true;

        break;

      }

  }

  if (!found){

 

      messagelist.add(mn);

  }

}