Check if ArrayList Contains a Map

[Aditya Sirohi]

Hello Folks,

I have the following snippet of code:-

public static void main(String[] args) {

		   ArrayList<Object> localArrayList1 = new ArrayList<Object>();
	           localArrayList1.add("Hello");
	           localArrayList1.add("World");
	      
	          ArrayList<String> myArr = new ArrayList<String>();
	          myArr.add("key");
		  myArr.add("bundleX");
		  HashMap<String, Object> map = new HashMap<String, Object>();
		  map.put("default", myArr);
		  localArrayList1.add(map);
	
		  for(int i=0;i<localArrayList1.size();i++){
			  System.out.println(localArrayList1.get(i));
		  }
	}

The output of this program is :-
Hello
World
{default=[key, bundleX]}

Is there a way i can detect if this ArrayList contains a Map and if it does can i get the key/value pair? Output like this:-
Hello
World
key: default / value: [key, bundleX]


Suggestions are appreaciated.
Thanks
Aditya

[Ernest Friedman-Hill]

Inside your "for" loop, you can just retrieve a value from the list, check if it's a map using "instanceof", and if so, print your special case output. Are you looking for something more obscure?

[Javin Paul]

once you know that you have Map , get its keyset by map.keyset() and iterate through it print key and value.