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arraylist.lastIndexOf(Object obj)

import java.util.ArrayList;

class Main {
    public static void main(String[] args){

        // Create an array
        ArrayList<String> sites = new ArrayList<>();

        sites.add("Google");
        sites.add("tutorialpro");
        sites.add("Taobao");
        sites.add("tutorialpro");
        System.out.println("Website List: " + sites);

        // Get the last occurrence of tutorialpro
        int position1 = sites.lastIndexOf("tutorialpro");
        System.out.println("tutorialpro last occurrence: " + position1);

        // Wiki is not in the arraylist
        // Returns -1
        int position2 = sites.lastIndexOf("Wiki");
        System.out.println("Wiki last occurrence: " + position2);
    }
}

Website List: [Google, tutorialpro, Taobao, tutorialpro]
tutorialpro last occurrence: 3
Wiki last occurrence: -1

// Returns 3
sites.lastIndexOf("tutorialpro");

// Wiki is not in the dynamic array, returns -1
sites.lastIndexOf("Wiki");