Question

我是JAVA的新手，我为这个问题苦苦挣扎，这对我来说是非常不清楚的。我礼貌地询问是否有人可以与我讨论或教我如何回答它？谢谢。

问题：

Company类包含一组雇员，其构造函数接收4个相同长度的数组。第一个数组是String数组，是员工的名字;第二个数组是一个String数组，它是各自的地址;第三个数组是一个int数组，分别是员工编号;第四个数组是一个双数组，分别是各自的工资。

我知道如何使用公共构造函数，但我不确定公司类的构造函数。

你的帮助对我很有价值。提前谢谢。

Answer 1

感觉就像一个非常简单的类结构。

public class Company {
Employee[] employees;

    public Company (String[] names, String[] addresses, int[] ids, double[] salaries) {
        employees = new Employee[names.length];
        for (int i = 0; i < employee.length; i++) {
            employees[i] = new Employee (names[i], addresses[i], ids[i], salaries[i]);
        }
    }

    static class Employee {
    String name;
    String address;
    int id;
    double salary;

        Employee (String name, String address, int id, double salary) {
            this.name = name;
            this.address = address;
            this.id = id;
            this.salary = salary;
        }
    }
}

如果这是学校作业并且您正在使用stackoverflow作弊，请删除问题。

Answer 2

public Company(String[] names, String[] addresses, int[] employeeNumbers, double[] salaries) {

}

更好的设计是

public Company(Employee[] employees) {

}

并拥有员工类

public class Employee {

    private String name;
    private String address;
    private int employeeNumber;
    private double salary; // you may not want to use this in production

    public Employee(String name, String address, int employeeNumber, double salary) {

    }
    // constructors, getters and setters, etc
}

根据@Kayaman评论，您似乎已经拥有了一个员工类，但出于某种原因，您不希望使用第一个构造函数来获取一组员工而不是4个数组。您希望使用带有4个数组参数的第一个构造函数，并从参数构造数组对象。这实际上是错误的编程。它会让你看起来很脏。

如果这是学校作业，你需要这样做，我猜教师可能只是想让你从中学到一些东西。但是这样的代码不应该写在生产中。

无论如何，这是您可能正在寻找的解决方案

public class Company {

    private Employee[] employees;

    public Company(String[] names, String[] addresses, int[] employeeNumbers, double[] salaries) {

        employees = new Employees[names.length]; // assuming all arrays are of the same length

        for (int i = 0;i < employees.length;i++) {
            employees[i] = new Employee(names[i], addresses[i], employeeNumbers[i], salaries[i]);
        }
    }
}

Answer 3

import java.util.ArrayList;
import java.util.Collections;    

public Class Company
{
  ArrayList<Employee> employees = new ArrayList<Employee>();

  public Company(Employee[] newEmployees)
  {
    employees.addAll(newEmployees);
  }
}

public Class Employee
{
  public String Name;
  public String Address;
  public Int Id;
  public Double Salary;

  public Employee(string name, string address, int id, double salary)
  {
     this.Name = name;
     this.Address = address;
     this.Salary = salary;
     this.Id = id;
  }
}

创建新公司：

Employee[] e = { 
  new Employee("Bob", "Bobs address", 1, 50000), 
  new Employee("Jane", "Janes address", 3, 85000) 
}

Company c = new Company(e);

使用参数创建此构造函数类

3 个答案: