Replace the value of existing element in ArrayList

In the previous post, we have seen how to swap two values in arrayList.In this post, we will learn how to replace the value of existing element in ArrayList.

We can use the method named ‘Set’ to update the element at a particular index.

Syntax:

public E set(int index, Element E)

index: Item index which needs to be replaced

Element E: The new value which is a replacement

Example:

import java.util.ArrayList;

public class ArrayListEx {

	public static void main(String[] args) {
		ArrayList<String> fruits1 = new ArrayList<String>();
		fruits1.add("Orange");
		fruits1.add("Mango");
		fruits1.add("Apple");
		fruits1.add("Grapes");
		
		System.out.println("Fruits list before replacement");
		for(String str : fruits1)
			System.out.println(str);
		
		//Value at index 1 (mango) is replaced with (Banana)
		fruits1.set(1, "Banana");
		System.out.println("Fruits list after replacement");
		for(String str : fruits1)
			System.out.println(str);

	}
}

Output:

Fruits list before replacement
Orange
Mango
Apple
Grapes
Fruits list after replacement
Orange
Banana
Apple
Grapes