List additionalStates = new ArrayList () List newStateList = new ArrayList (states) Creating an ArrayList from another collection Use addAll(Collection c) method to append all the elements in the specified collection to the end of this list.Use the ArrayList(Collection c) constructor to pass the collection as a parameter.There are two options to create an ArrayList from another collection. Keep in mind that index start with 0, so states.add(3, "Texas") will add at the 4th position and not 3rd Advertisements 3.2 Creating an ArrayList from Collection Adding an element at a particular index in an ArrayList 3.1 Creating an ArrayList and adding elements import Let’s see both variations with complete examples for better understanding. List intialList = Arrays.asList("California1","Alabama1") another ArrayList of Set), We can use the addAll() method to do that. If you want to add multiple elements (e.g. The void add(int index, E element) will add the element at the specified index.
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