构造函数需要多个子类super [英] Constructor requiring more than one for subclass super

问题描述

请帮助我从此代码中找到错误。我还是新的，我不知道这是否正确。
我有一个错误。
这是错误：
构造函数Person类中的Person不能应用于给定类型;
super（）;
^
必需：String，String，String
发现：无参数
原因：实际和形式参数列表长度不同
这是我的代码：

  import java.util。*; 
 
 public class Person {
 
 //数据字段
 private String lastName; 
 private String middleInitial; 
 private String firstName; 
 
 //构造函数
 public Person（String lastName，String middleInitial，String firstName）{
 this.lastName = lastName; 
 this.middleInitial = middleInitial; 
 this.lastName = lastName; 
} 
 
 //访问器方法
 public String getlastName（）{
 return lastName; 
} 
 
 public String getmiddleInitial（）{
 return middleInitial; 
} 
 
 public String getfirstName（）{
 return firstName; 
} 
 
 //变换器方法
 
 public void setlastName（String lastName）{
 lastName = lastName; 
} 
 
 public void setmiddleInitial（String middleInitial）{
 middleInitial = middleInitial; 
} 
 
 public void setfirstName（String firstName）{
 firstName = firstName; 
} 
 
 public String getName（）{
 String studentName = this.lastName +，+ this.firstName + 
 this.middleInitial +。 
 return studentName; 
} 
} // end Person类
 
类地址{
 
 //数据字段
 
 private String streetName; 
 private int zipCode; 
 private String state; 
 private String country; 
 
 //构造函数
 
 public Address（String streetName，int zipCode，String state，
 String country）{
 this.streetName = streetName; 
 this.zipCode = zipCode; 
 this.state = state; 
 this.country = country; 
} 
 
 //访问器方法
 
 public String getstreetName（）{
 return streetName; 
} 
 
 public int getzipCode（）{
 return zipCode; 
} 
 
 public String getstate（）{
 return state; 
} 
 
 public String getcountry（）{
 return country; 
} 
 
 //变换器方法
 
 public void setstreetName（String streetName）{
 streetName = streetName; 
} 
 
 public void setzipCode（int zipCode）{
 zipCode = zipCode; 
 //Integer.toString(zipCode）; 
} 
 
 public void setstate（String state）{
 state = state; 
} 
 
 public void setcountry（String country）{
 country = country; 
} 
 
 public String getAddress（）{
 String studentAddress = streetName +\\\
+ state +，+ country + 
\\\
 + zipCode; 
 return studentAddress; 
} 
} // end地址类别
 
 class Student extends Person {
 private String dateOfBirth; 
 
 //构造函数
 
 public Student（String studentName，String dateOfBirth）{
 super（）; 
 dateOfBirth = dateOfBirth; 
} 
 
 //访问器方法
 
 public String getdateOfBirth（）{
 return dateOfBirth; 
} 
 
 //变换器方法
 
 public void setdateOfBirth（）{
 this.dateOfBirth = dateOfBirth; 
} 
 
 public String toString（）{
 return（Date of Birth：+ dateOfBirth）; 
} 
} // end学生子类
  

编辑：如果我这样做对于Person和Address类。我只能有三个arg的构造函数。如何调用一个一参数构造函数？
例如，我有
public Student（String firstName，String lastName，String middleInitial，String dateOfBirth）{
super（firstName，lastName，middleInitial）;和
public Student（String streetName，String state，String country）{
super（streetName，state，country）;

如何单独获取邮政编码？

strong>

  public Student（String lastName，String middleInitial，String firstName，String studentName，String dateOfBirth）{
 super （lastName，middleInitial，firstName）; 
 this.dateOfBirth = dateOfBirth; 
} 
  

或

在 Person类中创建没有arg consructor。例如：
public Person（）{}

Please help me find errors from this code. I'm still new and I don't know if this is correct or not. I do have one error. This is the error: constructor Person in class Person cannot be applied to given types; super(); ^ required: String,String,String found: no arguments reason: actual and formal argument lists differ in length This is my code:

import java.util.*;

    public class Person {

        //Data fields
        private String lastName; 
        private String middleInitial;
        private String firstName;

        //Constructors
        public Person(String lastName, String middleInitial, String firstName) {
            this.lastName = lastName;
            this.middleInitial = middleInitial;
            this.lastName = lastName;
        }

        //Accessor methods
        public String getlastName() {
        return lastName;
        }

        public String getmiddleInitial() {
            return middleInitial;
        }

        public String getfirstName() {
            return firstName;
        }

        //Mutator methods

        public void setlastName(String lastName) {
            lastName = lastName;
        }

        public void setmiddleInitial(String middleInitial) {
            middleInitial = middleInitial;
        }

        public void setfirstName(String firstName) {
        firstName = firstName;
        }

        public String getName() {
            String studentName = this.lastName + ", " + this.firstName +
                this.middleInitial + ".";
            return studentName;
        }
    } //end Person class

    class Address {

        //Data fields

        private String streetName; 
        private int zipCode;
        private String state;
        private String country;

        //Constructors

        public Address(String streetName, int zipCode, String state, 
            String country) {
            this.streetName = streetName;
            this.zipCode = zipCode;
            this.state = state;
            this.country = country;
        }

        //Accessor methods

        public String getstreetName() {
            return streetName;
        }

        public int getzipCode() {
            return zipCode;
        }

        public String getstate() {
            return state;
        }

        public String getcountry() {
            return country;
        }

        //Mutator methods

        public void setstreetName(String streetName) {
            streetName = streetName;
        }

        public void setzipCode(int zipCode) {
            zipCode = zipCode;
            //Integer.toString(zipCode);
        }

        public void setstate(String state) {
            state = state;
        }

        public void setcountry(String country) {
            country = country;
        }

        public String getAddress() {
            String studentAddress = streetName + "\n" + state + ", " + country + 
                "\n" + zipCode;
            return studentAddress;
        }
    } //end Address class

    class Student extends Person { 
        private String dateOfBirth;

        //Constructors

        public Student (String studentName, String dateOfBirth) {
            super();
            dateOfBirth = dateOfBirth;
        }

        //Accessor methods

        public String getdateOfBirth() {
            return dateOfBirth;
        }

        //Mutator methods

        public void setdateOfBirth() {
            this.dateOfBirth = dateOfBirth;
        }

        public String toString() {
            return ("Date of Birth: " + dateOfBirth);
        }
    } //end Student subclass

Edited: If I do so for both the Person and Address class. I can only have three-arg constructors. How can I call a one-arg constructor? For example, I have public Student (String firstName, String lastName, String middleInitial, String dateOfBirth) { super(firstName, lastName, middleInitial); and public Student (String streetName, String state, String country) { super(streetName, state, country);

How can I get zipcode separately?

解决方案

Try this

In student class

 public Student ( String lastName, String middleInitial, String firstName,String studentName, String dateOfBirth) {
    super( lastName, middleInitial,firstName);
    this.dateOfBirth = dateOfBirth;
}

Or

In Person class create no arg consructor. Eg: public Person(){}

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