在类和被跳过的输入之间传递字符串

Question

这是Person类。

import java.util.Scanner;

public class Person {

    public static void main(String[] args) {

    }

    public Person(){
    }

    //asks for the name of the person and then returns the personName for the getName function to use it
    public static String setName(){
        Scanner input = new Scanner(System.in);
        System.out.println("What is the name of the person? ");
        String personName = input.toString();
        return personName;
    }

    public String getName(String personName){//returns the person name to be used with an Employee object
        return personName;
    }

}

这是Employee类。

import java.util.Scanner;

public class Employee extends Person {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Person person = new Person();
        Employee emp = new Employee();

        person.setName();//calls to the person class (because an Employee object extends the parent class)

        System.out.println("What is the salary? ");//asks for salary
        double annualSalary = input.nextDouble();

        System.out.println("What is the starting year? ");//ask for the starting year
        int startYear = input.nextInt();

        System.out.println("What is the insurance number? ");//ask for insurance number
        String insuranceNum = input.toString();

        System.out.println("Name: " + person.getName(person.setName()) + //intent is to retrieve the name of the person object
                           "\nSalary: " + emp.getAnnualSalary(annualSalary) + 
                           "\nStart Year: " + emp.getStartYear(startYear) + 
                           "\nInsurance Number: " + emp.getInsuranceNum(insuranceNum));
    }

    //constructor
    public Employee(){
    }

    //returns the salary of the employee
    public double getAnnualSalary(double annualSalary){
        return annualSalary;
    }

    //returns the year the employee started
    public int getStartYear(int startYear){
        return startYear;
    }

    //returns the insurance number of the employee
    public String getInsuranceNum(String insuranceNum){
        return insuranceNum;
    }
}

Answer 1

1. 我想你误解了getters和setters通常是用来做什么的。它们通常用于让另一个类访问Person类中存储的数据。

getName方法不应被赋予任何参数,并返回persons名称：

public String getName()
{
  return personName;
}

通常应向setName方法传递一个值,以便将personName设置为：

public void setName(String givenName)
{
  personName = givenName;
}

public class Person()
{
  private String personName;
  // constructor, you could give a person an initial name
  public Person(String name) 
  {
    personName = name;
  } 
  // setter/getter methods below
  // ...
  //end of setter/getter methods
}