我如何使它，如果用户输入4，它将显示规则文本文件?

Question

我正在制作一款hangman游戏，我想知道如何制作它，以便当用户输入4时，它将显示规则文本文件(rules.txt)

---

import java.util.Scanner;
class Hangman
{
public static void main(String[] args)
{
Scanner guess = new Scanner(System.in);
System.out.println("Hello, and welcome to Hangman!");
System.out.println("Choose (1)easy   (2)medium   (3)hard (4)rules: ");
int diff = guess.nextInt(); 
if(diff==1)
{
Play obj = new Play();
obj.Start(diff);
}
if(diff==2)
{
Play obj = new Play();
obj.Start(diff);
}
if(diff==3)
{
Play obj = new Play();
obj.Start(3);
}
else{
System.out.print("enter a valid number, please try again");
}
}
}

---

Answer 1

java.nio.file.Files.readString可以将整个文件读入内存，然后将其打印出来:

if (diff == 4) {
try {
System.out.println(Files.readString(Paths.get("rules.txt")));
} catch (IOException ex) {
ex.printStackTrace();
}
}