java - 类无法解析为类型？

Question

我是否需要以不同的方式定义 SpaService 类，或者以某种方式导入它？我是java新手，并且已经被困在这个问题上有一段时间了。这段代码几乎是我教科书上代码的精确副本，所以我真的很困惑为什么它不能编译。

public class SpaService 
{
    private String serviceDescription;
    private double price;
    public void setServiceDescription(String service)
    {
        serviceDescription = service;
    }
    public void setPrice(double pr)
    {
        price = pr;
    }
    public String getServiceDescription()
    {
        return serviceDescription;
    }
        public double getPrice()
    {
            return price;
    }
}

在单独的文件中:

import java.util.Scanner;

public class CreateSpaServices 
{
    public static void main(String[] args)
    {
        String service;
        double price;
        SpaService firstService = new SpaService();
        SpaService secondService = new SpaService();
        Scanner keyboard = new Scanner(System.in);
        System.out.print("Enter service >> ");
        service = keyboard.nextLine();
        System.out.print("Enter price >> ");
        price = keyboard.nextDouble();
        firstService.setServiceDescription(service);
        firstService.setPrice(price);
        keyboard.nextLine();
        System.out.print("Enter service >> ");
        service = keyboard.nextLine();
        System.out.print("Enter price >> ");
        price = keyboard.nextDouble();
        secondService.setServiceDescription(service);
        secondService.setPrice(price);
        System.out.println("First service details:");
        System.out.println(firstService.getServiceDescription() +
        " $" + firstService.getPrice());
        System.out.println("Second service details:");
        System.out.println(secondService.getServiceDescription() +
        " $" + secondService.getPrice());
    }
}

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
    SpaService cannot be resolved to a type
    SpaService cannot be resolved to a type
    SpaService cannot be resolved to a type
    SpaService cannot be resolved to a type

    at CreateSpaServices.main(CreateSpaServices.java:9)

编辑::通过将 SpeService 类放入与 CreateSpaServices 类(默认包中)相同的 src 内的单独包中并从所述包中导入该类，我能够使其正常运行。我是否需要在 IDE 中配置路径(我正在使用 Eclipse)？如果是这样，我应该如何处理，以便将来可以从完全独立的项目访问类？

Answer 1

编译错误意味着您没有事先修复错误。检查 SpaService 类中 IDE 中是否有任何内容下方有红线。