comparing two arrays and printing the inex of the first array [closed]

Question

hi im new to java and i want to compare two arrays from user input

enter the number of values in array : 5

  3 6 8 10 11
 enter the number of values in array : 4

   5 10 3 11

 output
 
     1 4 1 5

if element present in array 1 is also present in array 2, then print the index in array 1 if not ( in case of 5) , greatest values less than 5, then print its index

import java.io.*;
import java.util.*;

 class GFG {

// function to create hashsets
// from arrays and find
// their common element
public static void FindCommonElements(int[] arr1,
                                      int[] arr2)
{
    // create hashsets
    Set<Integer> set1 = new HashSet<>();
    Set<Integer> set2 = new HashSet<>();

    // Adding elements from array1
    for (int i : arr1) {
        set1.add(i);
    }

    // Adding elements from array2
    for (int i : arr2) {
        set2.add(i);
    }

    // use retainAll() method to
    // find common elements
    set1.retainAll(set2);
    System.out.println("Common elements- " + set1);
}

// main method
public static void main(String[] args)
{
    // create Array 1
    int[] arr1
        = { 3, 6, 8, 10, 11 };

    // create Array 2
    int[] arr2 = { 5, 10, 3, 11 };

    // print Array 1
    System.out.println("Array 1: "
                       + Arrays.toString(arr1));
    // print Array 2
    System.out.println("Array 2: "
                       + Arrays.toString(arr2));
    FindCommonElements(arr1, arr2);
}

}

how can i find and print the index rather than the values.