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Java Collections lastlastIndexOfSubList() Method with Example

Collections Class lastIndexOfSubList() method: Here, we are going to learn about the lastIndexOfSubList() method of Collections Class with its syntax and example.
Submitted by Preeti Jain, on February 03, 2020

Collections Class lastIndexOfSubList() method

  • lastIndexOfSubList() method is available in java.util package.
  • lastIndexOfSubList() method is used to return the starting index of the last occurrence of the given (dest) list within the given source list (src).
  • lastIndexOfSubList() method is a static method, so it is accessible with the class name and if we try to access the method with the class object then we will not get an error.
  • lastIndexOfSubList() method does not throw an exception at the time of returning the index of the last occurrence of the given List (dest).

Syntax:

    public static int lastIndexOfSubList(List src, List dest);

Parameter(s):

  • List src – represents the source list in which to filter the last occurrence of the given list(dest).
  • List dest – represents the targeted list(dest) to filter sublist of the given source list(src).

Return value:

The return type of this method is int, it returns starting index of the last occurrence of the given sublist (dest) within the given source list(src) otherwise it returns -1 when no search found or list empty.

Example:

// Java program is to demonstrate the example
// of int lastIndexOfSubList() of Collections

import java.util.*;

public class LastIndexOfSubList {
    public static void main(String args[]) {
        // Instantiate a LinkedList   
        List src_l = new LinkedList();
        List dest_l = new LinkedList();

        // By using add() method is to
        // add elements in linked list src_l
        src_l.add(10);
        src_l.add(20);
        src_l.add(30);
        src_l.add(40);
        src_l.add(50);

        // By using add() method is to
        // add elements in linked list dest_l
        dest_l.add(40);
        dest_l.add(50);

        // Display LinkedList
        System.out.println("link_l: " + src_l);
        System.out.println("dest_l: " + dest_l);

        System.out.println();

        // By using lastIndexOfSubList() method is to
        // return the starting index of last occurrence
        // of dest_l in src_l
        int index = Collections.lastIndexOfSubList(src_l, dest_l);

        //Display index
        System.out.println("Collections.lastIndexOfSubList(src_l,dest_l): " + index);
    }
}

Output

link_l: [10, 20, 30, 40, 50]
dest_l: [40, 50]

Collections.lastIndexOfSubList(src_l,dest_l): 3






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