我正在尝试测试封装，如果我调用新的Obj进行测试，这算在内吗？]

Question

我正在尝试测试封装。

我有两个对象部门和雇员。

部门通过Employee的实例，然后按照以下规则测试封装性

1。显示员工详细信息

2。显示部门详细信息

3。更改Employee objec中的值

4。再次显示部门详细信息（信息不应更改）

5。再次显示员工详细信息（此信息应在此处更改。）>

这有效，但是通过创建一个employee1的新实例，我是否得到封装错误的想法？？？？？

或

我应该为真正的封装设置值

employee1.setName("Sam")

这将部门名称的第二个display（）调用更改为Sam。

//Main
package question1;

public class Test {

    public static void main(String[] args) {
        //Creating a instance of both Employee and Department
        Employee employee1 = new Employee("2726354E", "Bob Ings", 30000 );
        Department mainDepartment = new Department("Main Floor", employee1);

        //Displaying both instances of Employee and Department
        employee1.display();    
        mainDepartment.display();

        System.out.println("");     


        //Changing values in constructor for the instance of Employee we made earlier on 
        employee1 = new Employee("626347B", "Sam O'Conor", 24000);

        mainDepartment.display();

        System.out.println("");     
        System.out.println("");

        employee1.display();

    }

}



//Employee Class
package question1;

public class Employee {
    private String ppsNum;
    private String name;
    private double salary;

    //Parameterized constructor 
    public Employee(String ppsNum, String name, double salary) {
        this.ppsNum = ppsNum;
        this.name = name;
        this.salary = salary;
    }

    //Displaying the instance of the object information in a anesthetically pleasing manner
    public void display() {
        System.out.println("Employee Information");
        seperationLine();
        System.out.println("Name: " + getName());
        seperationLine();
        System.out.println("PPS number: " + getPpsNum());
        seperationLine();
        System.out.println("Salary: " + getSalary() + "0");
        seperationLine();
        System.out.println("\n");


    }}

//Department Class
package question1;

public class Department {
    private String deptName;
    private Employee employee;
    private int officeNumber;

    //Constructor with all three parameters 
    public Department(String deptName, Employee employee, int officeNumber) {

        this.deptName = deptName;
        this.employee = employee;
        this.officeNumber = officeNumber;
    }

    //Constructor with the officeNumber set to 0
    public Department(String deptName, Employee employee) {

        this.deptName = deptName;
        this.employee = employee;
        this.officeNumber = 0;
    }

    //Displaying the instance of the object information in a anesthetically pleasing manner
    public void display() {
        System.out.println("Department");
        Employee.seperationLine();
        System.out.println("Department Name: " + getDeptName());
        Employee.seperationLine();
        System.out.println("Employee: " + employee.toString());
        Employee.seperationLine();
        System.out.println("Office Number: " + getOfficeNumber());

    }

}
我正在尝试测试封装。我有两个对象部门和雇员。 Department传递了Employee的一个实例，然后按照以下规则测试封装性：1.显示...

Answer 1

没有“测试”封装之类的东西。

您无需编写任何代码来确定您的类是否正确遵循了封装原理。封装是面向对象的分析和设计指南。不是编程功能。