Replace ArrayList elements using index in Java

In this example we will learn how to replace an element which is present in the ArrayList. We will use set(int index, Object obj) method to perform a replace operation. Now lets see how to replace an element in the ArrayList.

• Create a new empty ArrayList.
• Add elements to the ArrayList, using the add() method.
• Use set(index, element), this method will replace an element at the specified index of the arrayList with the given element

import java.util.ArrayList;

public class ArrayListReplaceExample {

	public static void main(String args[]) 
	{
		// Creating an empty array list
		ArrayList al = new ArrayList();
		
		//Adding elements to the arraylist
		al.add("Element1");
		al.add("Element2");
		al.add("Element3");

		System.out.println("List before Replacing element"+al);
		
		//Set method will replace the element which is present at the particular index
		al.set(1,"Java Interview Point");
		//List after setting a new element 
		System.out.println("List After Replacing element"+al);
	}
}

Output

List before Replacing element[Element1, Element2, Element3]
List After Replacing element[Element1, Java Interview Point, Element3]