无法从结果类型为 void 错误的方法返回值 [英] Cannot return a value from method whose result type is void error

问题描述

我试图从一种方法中获取用户输入并在另一种方法中使用它.我对无法从结果类型为 void 错误的方法返回值感到困惑，因为userMove"被定义为 int 类型.

I am trying to take the user input from one method and use it in another. I am confused about the cannot return a value from method whose result type is void error because "userMove" is defined as type int.

public static void move()
{
    System.out.println("What do you want to do?");
    Scanner scan = new Scanner(System.in);
    int userMove = scan.nextInt();
    return userMove;
}

public static void usersMove(String playerName, int gesture)
{
    int userMove = move();

    if (userMove == -1)
    {
        break;
    }

推荐答案

在返回 int 时，只需将 void 更改为 int.

Simply change void to int as you're returning an int.

public static int move()
{
    System.out.println("What do you want to do?");
    Scanner scan = new Scanner(System.in);
    int userMove = scan.nextInt();
    return userMove;
}

void 方法意味着它不返回任何内容(即没有 return 语句)，除了 void 之外的任何内容都需要返回.

A void method means it returns nothing (ie. no return statement), anything other then void and a return is required.

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