How to store a Scanner input and have it correspond with an array? Then pick a random element from that array

Working on a beginner java project.

The idea of the program is to take in user's favorite genre and return a random recommendation based on a top 10 (starting with 3 now) list of books in each genre.

My main question is how could I take in their input, make it correspond to the right array and print out a random element from that array in the getRecommendation() method.

Code below (left out imports and public class):

public WhatBook() {
    
    System.out.println("Hello, what genre of book are you in the mood for?");
        System.out.println("Please enter: \n1 for Horror\n2 for Adventure\n3 for Crime\n4 for War\n5 for Scifi");
        while (true) {
        Scanner scanGenre = new Scanner(System.in);
        int bookGenre = scanGenre.nextInt();
        
        if (bookGenre < 1 || bookGenre > 5) {
            System.out.println("Please choose from the genres from 1 to 5.");
        } else {
            System.out.println(bookGenre + "? Great choice! Let's get some recommendations for you.");
            break;
        }
        
    }


public static String getRecommendation() {

    // pick random element of the entered genre array
    // create random object
    int rnd = new Random().nextInt(array.length);
    return array(rnd);

}

// public arrays
String[] horror = { "The Shining", "The Stand", "The Haunting of Hill House" };
String[] adventure = { "Into Thin Air", "Hatchet", "The Call of the Wild" };
String[] crime = { "In Cold Blood", "Devil in the White City", "Helter Skelter" };
String[] war = { "The Things They Carried", "All Quiet on the Western Front", "Catch-22" };
String[] scifi = { "Dune", "1984", "Ender's Game" };

public static void main(String[] args) {

    WhatBook user1 = new WhatBook();

}

I tried using a switch loop in the constructor to set each int value to its corresponding array. Like:

switch (bookGenre) {

case 1: bookGenre = horror[0]; break; etc...

but this doesn't work.

Any ideas how to store the bookGenre int value to match its array?