How to find index position of an element in a list when contains returns true

Question

I've got a List of HashMap so I'm using List.contains to find out if the list contains a specified HashMap. In case it does, I want to fetch that element from the list, so How do I find out index position of where the element is?

    List benefit = new ArrayList();     HashMap map = new HashMap();     map.put("one", "1");     benefit.add(map);     HashMap map4 = new HashMap();     map4.put("one", "1");      System.out.println("size: " + benefit.size());     System.out.println("does it contain orig: " + benefit.contains(map));     System.out.println("does it contain new: " + benefit.contains(map4));      if (benefit.contains(map4))         //how to get index position where map4 was found in benefit list? 

Answer 1

benefit.indexOf(map4) 

It either returns an index or -1 if the items is not found.

I strongly recommend wrapping the map in some object and use generics if possible.