Question

我似乎在使用Java运行Yahtzee游戏时遇到了一些问题。我的代码中不断出现“找不到主要方法”错误，即使我在代码中早先指定了它。任何帮助，将不胜感激。

import java.util.Scanner;

public class NathanMassey_221_Midterm {

int faceValue;
public void roll(){
    faceValue = (int)(Math.random() * 6 + 1);
}

public int getValue(){
    return faceValue;   
}

public String toString(){
    return Integer.toString(faceValue);
}
}

class Yahtzee {
public static void main(String[] args) {
    Scanner keyboard = new Scanner (System.in);
        introduction();
        boolean runAgain = true;
        while (runAgain){
            boolean rolledYahtzee = false;
            int numRolls = 0;
            NathanMassey_221_Midterm [] dieArray = dieArray(keyboard);
            while(!rolledYahtzee){
                dieArray = rollDice (dieArray);
                numRolls++;
                printDots(numRolls);
                rolledYahtzee = checkForYahtzee(dieArray, numRolls);
            }
            printResults (numRolls, dieArray);
            runAgain = runAgain(keyboard);
        }
}

public static void introduction(){
    System.out.println("This program will");
}


public static NathanMassey_221_Midterm [] dieArray(Scanner keyboard){
    int numDice = getInt(keyboard, "How many dice do you want to throw? ");
    while (numDice <= 0){
        System.out.println("Sorry, you must enter a positive number.");
        numDice = getInt(keyboard, "How many dice do you want to throw? ");
    }
    NathanMassey_221_Midterm [] dieArray = new NathanMassey_221_Midterm [numDice];
    return dieArray;
}

public static int getInt (Scanner keyboard, String prompt){
    System.out.print(prompt);
    while (!keyboard.hasNextInt()){
        keyboard.next();
        System.out.println("Sorry, you must enter an integer.");
        System.out.print(prompt);
    }
    return keyboard.nextInt();
}

public static NathanMassey_221_Midterm [] rollDice(NathanMassey_221_Midterm [] dieArray){
    for (int i = 0; i < dieArray.length; i++){
        dieArray[i] = new NathanMassey_221_Midterm ();
        dieArray[i].roll();
        dieArray[i].faceValue = dieArray[i].getValue();
    }
    return dieArray;
}

public static void printDots(int numRolls){
    System.out.print(".");
    if ((numRolls%50) == 0){
        System.out.println();
    }
}

public static boolean checkForYahtzee(NathanMassey_221_Midterm[] dieArray, int numRolls) {
    for(int i = 0; i < dieArray.length; i++) {
        for(int j = i+1; j < dieArray.length; j++) {
            if(dieArray[i].getValue() != dieArray[j].getValue()) {
                return false;
            }
        }
    }
    return true;
}

public static void printResults (int numRolls, NathanMassey_221_Midterm[] dieArray){
    System.out.println();
    System.out.println("Yahtzee!!");
    System.out.print("After " + numRolls + " rolls, I finally rolled ");
    System.out.println(dieArray.length + " " + dieArray[0].getValue() + "'s");
    System.out.println();   
}

public static boolean runAgain (Scanner keyboard){
    System.out.print("Do you want to run another experiment? (y|n)):    ");
    String answer = keyboard.next().trim().toLowerCase();
    keyboard.nextLine();
    System.out.println();
    return (answer.charAt(0) == 'y');
}
}

Answer 1

您是否尝试过分类，例如有一个主类。将一切都推到一个文件中并不是很好的做法我也不相信java喜欢在另一个类中拥有一个主类这是当前的问题。您还使用IDE或某种构建实用程序吗？以及哪个特定的IDE或构建实用程序？如果你确实希望一个类中的所有东西都摆脱主方法之前的类标题

Answer 2

我假设您正在尝试访问公共类NathanMassey_221_Midterm的主要方法，该方法不存在。例如，如果您在Eclipse中工作，则必须自己创建启动配置并指定Yahtzee作为主类（iirc，默认情况下，单击“run”将尝试运行公共类的main方法）。 / p>

Yahtzee游戏主要方法

2 个答案: