java - 它显示客户已定义的错误。请让我知道发生了什么错误以及如何纠正它

Question

出现一个错误，指出类名已经定义，我找不到解决的方法

此外，类名仅声明一次，无法找到出错的地方

package practo;
import java.io.*;
import java.lang.*;
import java.util.*;

@SuppressWarnings("unused")
class Customer     /* compilation error occurs here */
{
    private int id;
    private String name;
    private String email;
    private String address;
    void setid(int id)
    {
        this.id=id;
    }
    int getid()
    {
        return id;
    }
    void setname(String name)
    {
        this.name=name;
    }
    String getname()
    {
        return name;
    }
    void setemail(String email)
    {
        this.email=email;
    }
    String getemail()
    {
        return email;
    }
    void setaddress(String address)
    {
        this.address=address;
    }
    String getaddress()
    {
        return address;
    }
    class PhoneNumber
    {
        private String phoneNumber;
        private String heldFromDate;
        private String heldToDate;
        void setphoneNumber(String phoneNumber)
        {
            this.phoneNumber=phoneNumber;
        }
        String getphoneNumber()
        {
            return phoneNumber;
        }

        void setheldToDate(String heldToDate)
        {
            this.heldToDate=heldToDate;
        }
        String getheldToDate()
        {
            return heldToDate;
        }

        public String getHeldFromDate() {
            return heldFromDate;
        }
        public void setHeldFromDate(String heldFromDate) {
            this.heldFromDate = heldFromDate;
        }
        class NumberType
        {
            private String code;
            private String description;
            void setcode(String code)
            {
                this.code=code;
            }
            void setdescription(String description)
            {
                this.description=description;
            }
            String getcode()
            {
                return code;
            }
            String getdescription()
            {
                return description;
            }
        }
    }
}

class x1
{
    public void main(String args[])
    {
        @SuppressWarnings("resource")
        Scanner s=new Scanner(System.in);
        Customer c=new Customer();
        Customer.PhoneNumber p=c.new PhoneNumber();
        Customer.PhoneNumber.NumberType n=p.new NumberType();
        System.out.println("Enter the customer details");
        System.out.println("Enter the  id :");
        int id=s.nextInt();
        c.setid(id);
        System.out.println(c.getid());
        System.out.println("Enter the name :");
        String name=s.nextLine();
        c.setname(name);
        System.out.println(c.getname());
        System.out.println("Enter the email :");
        String email=s.nextLine();
        c.setemail(email);
        System.out.println(c.getemail());
        System.out.println("Enter the address :");
        String address=s.nextLine();
        c.setaddress(address);
        System.out.println(c.getaddress());
        System.out.println("Enter the customer contact details");
        System.out.println("Enter the phone number :");
        String phoneNumber=s.nextLine();
        p.setphoneNumber(phoneNumber);
        System.out.println(p.getphoneNumber());
        System.out.println("Enter the held from date (dd/MM/yyyy)  :");
        String heldFromDate=s.next();
        p.setHeldFromDate(heldFromDate);
        System.out.println(p.getHeldFromDate());
        System.out.println("Enter the held to date (dd/MM/yyyy)  :");
        String heldToDate=s.next();
        p.setheldToDate(heldToDate);
        System.out.println(p.getheldToDate());
        System.out.println("Enter number type code :");
        String code=s.next();
        n.setcode(code);
        System.out.println(n.getcode());
        System.out.println("Enter number type description");
        String description=s.next();
        n.setdescription(description);
        System.out.println(n.getdescription());
    }

}

Answer 1

您的类(class)没有给我任何编译错误。您可以尝试将该类设为公开类，即public class Customer和名称为Customer.java的文件名。软件包practo可能已经包含一个名为Customer的类。