List lastIndexOf() Method in Java with Examples

This method returns the last index of the occurrence of the specified element in this list, or -1 if this list does not contain the element.

Syntax:

int lastIndexOf(Object o)

Parameters: This function has a single parameter, i.e, the element to be searched in the list.

Returns: This method returns the last index of occurrence of the given element in the list and returns “-1” if element is not in the list.

Below programs show the implementation of this method.

Program 1:

// Java code to show the implementation of 
// lastIndexOf method in list interface 
import java.util.*; 
public class GfG { 
  
    // Driver code 
    public static void main(String[] args) 
    { 
  
        // Initializing a list of type Linkedlist 
        List<Integer> l = new LinkedList<>(); 
        l.add(1); 
        l.add(3); 
        l.add(5); 
        l.add(7); 
        l.add(3); 
        System.out.println(l); 
        System.out.println(l.lastIndexOf(3)); 
    } 
} 

Output:

[1, 3, 5, 7, 3]
4

Program 2: Below is the code to show implementation of list.lastIndexOf() using Linkedlist.

// Java code to show the implementation of 
// lastIndexOf method in list interface 
import java.util.*; 
public class GfG { 
  
    // Driver code 
    public static void main(String[] args) 
    { 
  
        // Initializing a list of type Linkedlist 
        List<String> l = new LinkedList<>(); 
        l.add("10"); 
        l.add("30"); 
        l.add("50"); 
        l.add("70"); 
        l.add("30"); 
        System.out.println(l); 
        System.out.println(l.lastIndexOf("30")); 
    } 
} 

Output:

[10, 30, 50, 70, 30]
4

Reference:
Oracle Docs

My Personal Notes

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