School Java Escape Room Program

I am writing an escape room project for school which has messages such as a greeting, a win message, a loss message, etc. I stored these messages in a text file and then I read the file and store each line into one ArrayList and to access each line by their respective getter method and I use the .get function with their index value. I'm wondering if there is a way to avoid hardcoding the index numbers and on top of that is there a way I can just read the file when the program is run instead of having to make an instance of the class and then for example doing foo.readFile();

import java.io.File;
import java.util.Scanner;
import java.io.FileNotFoundException;
import java.util.ArrayList;
//package Stage;

public class EscapeRoom{

	ArrayList<String> Messages;
	String fileName;
	private boolean win = false;

	public void readFile() throws FileNotFoundException {

		Messages = new ArrayList<String>();
		fileName = "test.txt";
		
		File file = new File(fileName);	
		Scanner scanner = new Scanner(file);
		while(scanner.hasNextLine()){
			Messages.add(scanner.nextLine());
		}
		scanner.close();

	}	
	
	public void showGreeting(){
		System.out.println(Messages.get(0));
	}
	public void showDirections(){
		System.out.println(Messages.get(1));
	}
	public void showWin() {
		System.out.println(Messages.get(2));
	}
	public void showLoss() {
		System.out.println(Messages.get(3));
	}
}

This is exactly what a properties file is for. Here is a file I named prompts.properties:

greeting = "hello, welcome to my game"
win = "you win, yay"
loss = "sorry bro, you lose"
directions = "escape with your life!"

Here is your modified program:

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

public class EscapeRoom {

    Properties prompts = null;

    public void readFile() throws IOException {
        prompts = new Properties();
        prompts.load(new FileInputStream("prompts.properties"));
    }

    public void showGreeting() {
        System.out.println(prompts.get("greeting"));
    }

    public void showDirections() {
        System.out.println(prompts.get("directions"));
    }

    public void showWin() {
        System.out.println(prompts.get("win"));
    }

    public void showLoss() {
        System.out.println(prompts.get("loss"));
    }
}

Basically to get a named key-value pair you want something like a map. Properties are really a special sort of map that understands a file of records that have the format <key> = <value>.

Here is the documentation on Properties and if you decide to roll your own you would implement the same basic thing with a Map.