How To Randomly Select A String In Array Based On Corresponding Number

I'm trying to generate a random word from the array that I have made including the words by making it corresponding with a randomly generated number. So for example, if the number generated is 0, then the word that the person has to guess would be "AUNT". How would I transfer the randomly generated number from one method into the array method to get the word the person has to guess?

Write a program called Word Guessing Game. Open the file FourLetterWords.txt and write the contents into an array of Strings (the file has 87 words in it). Then use a randomly generated number between 0 and 86 to select a word. The player will then try to guess the word selected by the game. The player is allowed 7 tries, if the player does not guess the word on the 7th try he/she losses. Display the letter of the word as they are guessed in the correct order, you will also display the incorrect letters. The game is over when:

- The player completes the word, or guesses the whole word correctly.
- The player does not guess the word in seven tries.
The player must also be allowed to terminate the game.
The game must have at least 5 classes:
- Main Class
- Class to return a random integer between 0 and 86.
- Class to return a populated array of 87, 4 letter words.
- Class to return a character that the player enters from the keyboard.
- Class to display both the correctly guessed letters and the incorrect letters.

My code (it is not complete, my attempt to do what I am trying to do is obviously not working.)

import java.util.Scanner;
public class WordGuessingGame {
public static void main(String[] args) {
final int NUMBER_OF_WORDS = 87;
RandomWordGenerator.random(NUMBER_OF_WORDS);

[code]...