Add a collection of elements at a position to ArrayList

In the previous post, we have seen how to add the collections to arrayList. In this post, we will learn about how to add a collection of elements at a position to ArrayList.

We will use the below method to add a collection at a particular position in the list.

Syntax:

public boolean addAll(int index, Collection c)

index: The position where the collection will be added. Index starts from zero(0).

Collection c: It is another arraylist which will be added at the particular index.

Example:

import java.util.ArrayList;

public class ArrayListEx {

	public static void main(String[] args) {
		ArrayList<String> fruits = new ArrayList<String>();
		fruits.add("Apple");
		fruits.add("Orange");
		fruits.add("Mango");
		fruits.add("Grapes");

		System.out.println("Fruits list : "+fruits);
		
		ArrayList<String> vegitables = new ArrayList<String>();
		vegitables.add("carrot");
		vegitables.add("potato");
		vegitables.addAll(2, fruits);
		
		System.out.println("Vegitables + Fruits : "+vegitables);
	}
}

Output: