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
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