Arraylist lastIndexOf() Method in Java with Examples

In Java, the lastIndexOf() method is used to find the index of the last occurrence of a specified element in an ArrayList.

Example 1: Here, we will use the lastIndexOf() method to find the index of the last occurrence of a specific element in an ArrayList of integers.

The last index of 22 is: 1

Syntax of ArrayList lastIndexOf() Method

public int lastIndexOf(Object o)

• Parameter: The object o whose last index is to be returned.
• Return Type: It returns the last occurrence of the element passed in the parameter. It returns -1 if the element is not found.

Example 2: Here, we use the lastIndexOf() method to find the last occurrence of an element in an ArrayList of strings.

The last index of Orange is: 2

Example 3: In this example, we will use the lastIndexOf() method with an ArrayList of custom objects. Here, we will find the last index of a specific object in the list.