Java 未能在if语句中使用字符串

您好，很抱歉这个大胆的问题，但我不知道如何解决我在代码第24行和第30行的需求。另外，我在第33行和第22行收到错误消息，所以如果你能解决这些问题，那就太棒了

import java.util.Scanner;

public class CheckOrder {


    public static Scanner userInput = new Scanner(System.in);
    public static Scanner userInputStarters = new Scanner(System.in);

    public static String menu;
    public static String check;
    public static String TheRestroom = "The Restroom";
    public static String Restroom = "Restroom";
    public static String Eat = "Eat";
    public static String ToEat = "To Eat";
    public static String restOrEat;


    public static void main(String[] args) {

        System.out.print("Hello and Welcome to the SOMETHING restaurant. Would you like to eat or use the restroom?");
        public static restOrEat = userInput.NextInt();

        if (restOrEat.equalsIgnoreCase(TheRestroom || Restroom)) {

            System.out.println("Please go ahead to the restroom, it's over there.");
            System.exit(1);
        }

        if (restOrEat.equalsIgnoreCase(Eat || ToEat)) {

            System.out.print("What would you like to eat for starters? Press 1 for Cheese & Bacon, 2 for Sald (With options) and 3 for noodles");
            public static String starter = userInputStarters;

        }


    }

}

---

首先，在main方法中，不能使用publicstatic。而且restOrEat听起来应该是一个yes或no字符串，所以你不能说nextInt。如果只是一个单词，请使用next；如果需要整行，请使用nextLine。在IF语句中，你不能在均衡器调用中使用运算算子，但是你需要把两个运算放在中间，把π放在中间。 如果它符合你的需要，试试这个

import java.util.Scanner;

public class CheckOrder {

    public static Scanner userInput = new Scanner(System.in);
    public static Scanner userInputStarters = new Scanner(System.in);

    public static String menu;
    public static String check;
    public static String TheRestroom = "The Restroom";
    public static String Restroom = "Restroom";
    public static String Eat = "Eat";
    public static String ToEat = "To Eat";
    public static String restOrEat;


    public static void main(String[] args) {

        System.out.print("Hello and Welcome to the SOMETHING restaurant. Would you like to eat or use the restroom?");
        restOrEat = userInput.next();

        if (restOrEat.equalsIgnoreCase(TheRestroom) || restOrEat.equalsIgnoreCase(Restroom)) {

            System.out.println("Please go ahead to the restroom, it's over there.");
            System.exit(1);
        }

        if (restOrEat.equalsIgnoreCase(Eat) || restOrEat.equalsIgnoreCase(ToEat)) {

            System.out.print("What would you like to eat for starters? Press 1 for Cheese & Bacon, 2 for Sald (With options) and 3 for noodles");
            int starter = userInputStarters.nextInt();

        }


    }

}

| |运算符不能应用于java.util.String

restOrEat.equalsIgnoreCase(Eat || ToEat);

变量Eat和ToEat都是类java.util.String中的对象。这就是| |运算符在这种情况下不起作用的原因

将其更改为：

restOrEat.equalsIgnoreCase(Eat) || restOrEat.equalsIgnoreCase(ToEat);

---

这将起作用。

您不能像在main方法中那样编写“publicstatic”

if (restOrEat.equalsIgnoreCase(TheRestroom) || restOrEat.equalsIgnoreCase(Restroom)) {

---

用上述引用替换两行

首先，如果if语句不正确，则它们应该是这样的if restOrEat.equalsignorecasetrestorom | restOrEat.equalsignorecase restoroom{

其次，在方法中的变量前面不能有公共关键字和静态关键字

因此，将公共静态restOrEat更改为int restOrEat也会丢失对象定义，似乎您已经将其定义为类中的字符串，并且NextInt应该是NextInt

---

另外，请检查此项

您有几个问题：

或条件| |应介于到检查之间

if (restOrEat.equalsIgnoreCase(TheRestroom) || restOrEat.equalsIgnoreCase(Restroom)) { }

您将restOrEat定义为类变量，但在main中重新定义了它

publicstatic对于方法变量（甚至不是单独的）语法无效，并且您没有该类型

userInput.NextInt；将返回int，但restOrEat是字符串。请改用userInput.next

---

以下是您问题的解决方案。

请发布一个类似于但可编译的MCCVE。阅读内容：您是否尝试将sys.out放入并检查。用户输入可能需要修剪。您不应该一次性检查equalsIgnoreCase。您认为TheRestroom | | Restroom做什么？您是否愿意解释它是什么？您仍然没有解释什么这不是问题的起因吗？

public static restOrEat = userInput.NextInt();

import java.util.Scanner;
class CheckOrder {


public static Scanner userInput = new Scanner(System.in);
public static Scanner userInputStarters = new Scanner(System.in);

public static String menu;
public static String check;
public static String TheRestroom = "The Restroom";
public static String Restroom = "Restroom";
public static String Eat = "Eat";
public static String ToEat = "To Eat";
public static String restOrEat;


public static void main(String[] args) {

    System.out.print("Hello and Welcome to the SOMETHING restaurant. Would you like to eat or use the restroom?");
    restOrEat = userInput.next();

    if (restOrEat.equalsIgnoreCase(TheRestroom)||restOrEat.equalsIgnoreCase(Restroom)) {

        System.out.println("Please go ahead to the restroom, it's over there.");
        System.exit(1);
    }

    if (restOrEat.equalsIgnoreCase(Eat)||restOrEat.equalsIgnoreCase(ToEat)) {

        System.out.print("What would you like to eat for starters? Press 1 for Cheese & Bacon, 2 for Sald (With options) and 3 for noodles");
        int starter = userInputStarters.nextInt();

    }
}
}