设置我的 Hangman 方法并在我的主方法中调用它们

Question

很难将Game类中的方法调用到绞刑游戏的主方法。我们应该旋转一个轮子以获得100250或500美元的头奖金额，然后按照你的预期玩游戏……但方法是必要的。我还没有完成，我只是想在这一点上调用我的方法，看看它是如何工作的。这是我的代码：

import java.util.Scanner;
import java.util.Random;

public class GameDemo {
    public static void main(String[] args) {
        String[] songs = {"asdnj", "satisfaction", "mr jones",
        "uptown funk"}; //note this is a very short list as an example 
        Random rand = new Random();
        int i = rand.nextInt(songs.length);
        String secretword = songs[i];
        System.out.print("Welcome to The Guessing Game. The topic is song      titles. \nYou have 6 guesses. Your puzzle has the following letters: ");
        System.out.print("After spinning the wheel, you got " + spinWheel());

        //continue the code here.
    }
}

class Game {
    Random rand = new Random();
    String[] songs = {"asdnj", "satisfaction", "mr jones",
    "uptown funk"};
    int i = rand.nextInt(songs.length);
    private String secretword = songs[i];
    private char [] charSongs = secretword.toCharArray();
    private char [] guessed = new char [charSongs.length];
    private int guesses;
    private int misses; 
    private char letter;
    private char [] jackpotAmount = {100,250,500};

    public Game (){}

    public int spinWheel(int[] jackpotAmount){
      int rand = new Random().nextInt(jackpotAmount.length);
      return jackpotAmount[rand];
    }

    public char guessLetter(char charSongs [], char letter){
        int timesFound = 0;
        for (int i = 0; i < charSongs.length; i++){
           if (charSongs[i] == letter){
             timesFound++;
             guessed[i] = letter;
           }
        }
        return letter;
    }
}

返回错误是

游戏演示。java:11:error:找不到符号System.out。打印（“旋转轮子后，你得到了”spinWheel（））^

Answer 1

spinWheel方法调用中存在几个问题：

1. 您还没有实例化任何Game对象来调用此方法。要么你必须使它＜code＞静态＜/code＞，要么你只需要实例化一个＜code＞游戏＜/code＞并从这个objet调用它。我个人更喜欢第二个（非静态）选项，因为，特别是因为静态方法不能直接访问非静态方法或变量（……您需要一个实例或使它们＜code＞static＜/code＞）

主要来说，您可以这样做（非静态解决方案）：

Game game = new Game();
System.out.print("After spinning the wheel, you got " + game.spinWheel());

spinWheel变为：

//you can have "public static int spinWheel(){" 
//if you chose the static solution
//Note that jackpotAmount should also be static in that case
public int spinWheel(){
    int rand = new Random().nextInt(jackpotAmount.length);
    return jackpotAmount[rand];
}

请注意，＜code＞jackpotAmount＜/code＞最好是＜code＞int[]＜/code>，而不是＜code＞char[]

Answer 2

要从另一个类调用方法，您需要使该方法公开。完成此操作后，如果多次调用相同的方法，并且希望它每次都执行相同的函数（参数仍然可以不同），请使它们成为静态。

要调用该方法，请执行以下操作（这是大多数类和方法的通用形式，您应该能够使用它来调用所有方法）：

yourClassWithMethod.methodName();