Question

在while循环中，我尝试将购买设置为用作输入存储设备的选项，并从可购买选项中进行选择。

我想知道是否可能，如果是，如何，同时接受布尔值或整数，取决于用户是想增加pageAmount还是购买升级。

import java.util.Scanner;

public class BookieClickerV1
{
public static void main(String [] args)
{
    double pageAmount = 0;
    int penNumber = 0;
    int scribeNumber = 0;
    int printingNumber = 0;
    int printerNumber = 0;
    int conwayNumber = 0;
    int mageNumber = 0;
    boolean gameStarted = true;
    boolean click = false;
    int purchase = 0;
    Scanner reader = new Scanner(System.in);

        System.out.println("Welcome to Bookie Clicker V1.0.");
        System.out.println("As this is the first version of the game, it can        be rather buggy");
        System.out.println("When you are ready to begin, type 'True' to represent a click.");
        System.out.println("Use the reference handed to you to know what you're purchasing.");

    while (gameStarted = true)
    {
        click = reader.nextBoolean();


            if (purchase == 1)
            {
                pageAmount -= Math.pow(15, (1.2 * (penNumber + 1)));
                penNumber += 1;
                purchase = 0;
            }
            if (purchase == 2)
            {
                pageAmount -= Math.pow(100, (1.2 * (scribeNumber + 1)));
                scribeNumber += 1;
                purchase = 0;
            }
            if (click == true)
            {
                if (penNumber > 0)
                {
                    pageAmount++;
                }


                pageAmount++;
                click = false;
                System.out.println("Your total number of pages written is "       + pageAmount);
            }
        }
    }
}

Answer 1

您可以接受整行，然后查看它是否为整数。像这样：

String line = reader.nextLine();
try {
    int purchase = Integer.parseInt(line);
    // ...
} catch (NumberFormatException e) {
    // Just use .equals() if you want it to be case-sensitive.
    if (line.equalsIgnoreCase("True" /* or "Click", etc. */)) {
        // ...
    }
}

另请注意，您的行中有错误

while (gameStarted = true)

使while循环无限（因为=将gameStarted变量设置为true，导致循环永远不会结束）。它应该是

while (gameStarted == true)

或只是

while (gameStarted)

Answer 2

这可能不是最有效的解决方案，当然也不是最复杂的解决方案，因为我在高中时只学了两年Java，所以没有花哨的方法或特殊的东西。

你可以使用这样的代码块：

String a = scanner.next();//store input, makes it easier to manipulate
if(a.startsWith("T") || a.startsWith("F"))//this assumes the user enters true/false as an input
{
     //execute correct code, you could set a boolean true, execute a method
     //or whatever else you wanted to do
}

else
{
    int upgradeInt = Integer.parseInt(a);//you need this to get the 
    //input converted into an int. This is an edit, I forgot this step.      
    //executes correct code and can use String a to pass an upgrade or 
    //however you need your code to run
}

我这样做是因为我不喜欢，但我不相信这是解决问题的最有效或最正确的方法。而且，正如Doorknob指出的那样，while - loop的条件不应该只有一个=，而应该有一个==，因为这是比较原始数据（如布尔值）的正确方法。在您拥有的情况下，您将布尔值设置为某个值，在这种情况下，这将使您进入无限循环。

如何将我的游戏设置为同时接受布尔值或int

2 个答案: