有人可以請解釋這部分代碼的含義是什麼？ setEmployeeNumber（num）

-8

我被要求爲代碼寫評論，但我不明白setEmployeeNumber（num）在做什麼。爲什麼它沒有寫setEmployeeNumber = number呢？我的所有其他評論是否正確？在此先感謝 /** Employee類 */有人可以請解釋這部分代碼的含義是什麼？ setEmployeeNumber（num）

 public class Employee//creating employee class 
    {//declaring fields 
private String name;    
private String employeeNumber; 
private String hireDate;   


public Employee(String n, String num, String date)//construtor for Employee class with param n,num,date 
    { 
    name = n; //assigning value of n to name 
    setEmployeeNumber(num);//set employee 
    hireDate = date;//assign value of date to hireDate 
    } 

    public Employee()//non parametrized constructor 
    { 
    name = "";//set name to empty string 
    employeeNumber = "";//set employeeNumber to empty string 
    hireDate = "";//set hireDate to empty string 
    } 


    public void setName(String n)//setter with param n 
    { 
    name = n;//assign value of n to name 
    } 


    public void setEmployeeNumber(String e)//setter with param e 
    { 
    if (isValidEmpNum(e))//if string e is a valid employee number store the value of e in employee number else set employee number to empty string 
    employeeNumber = e; 
    else 
    employeeNumber = ""; 
    } 


    public void setHireDate(String h)//setter with param h 
    { 
     hireDate = h;//assign the string h to hireDate 
    } 

     public String getName()//getter 
    { 
    return name;//return value of name 
    } 


    public String getEmployeeNumber()//getter 
    { 
     return employeeNumber;//return value of employeeNumber 
     } 


    public String getHireDate()//getter 
    { 
     return hireDate;//return value of hireDate 
    } 

    private boolean isValidEmpNum(String e)//method to return true or false if employee number is valid or invalid 
    { 
     boolean status = true;//setting default status to True 

    if (e.length() != 5)//if the length of string e does not equal to 5 then employee number is invalid,set status to false 
    status = false; 
    else 
    { 
    if ((!Character.isDigit(e.charAt(0))) ||//if the first char in string e is not a digit OR the 2nd char isnt a digit of the 3rd char is not a digit or the 4th char is not a dash OR the 5th char is not a letter than employee number is invalid,set status to false 
     (!Character.isDigit(e.charAt(1))) || 
     (!Character.isDigit(e.charAt(2))) || 
     (e.charAt(3) != '-')    || 
     (!Character.isLetter(e.charAt(4)))) 
      status = false; 
    } 

    return status;//returing true or false

}

public String toString()//Method to returns a string representation of the object 
    { 
    String str = "Name: " + name + "\nEmployee Number: ";//making a new string called str 

    if (employeeNumber == "")//if employeeNuber is invalid 
    str += "INVALID EMPLOYEE NUMBER";//add "INVALID EMPLOYEE NUMBER" to string str 
    else 
    str += employeeNumber;//add value of employeeNumber to string str 

    str += ("\nHire Date: " + hireDate);//add "\nHire Date: " and value of hireDate to string str 
    return str;//returning the string str 
    } 
    }

來源

2016-02-20 tobychubby99

您還沒有發佈'setEmployeeNumber'的代碼......但是，根據名稱判斷，它可能會將'num'分配給'employeeNumber'變量。 – Tunaki

「創建員工類」是錯誤的。 **聲明員工類別 –

作爲旁註 - 您已完成評論。把一個評論，比如'賦予n的名稱值'到一個說'name = n;'的行是完全多餘的。你的意見不應該解釋java是如何工作的，他們應該解釋代碼的邏輯 –

要調用的方法。註釋應該比別人在構造函數中真的沒有什麼不同，但如果你想成爲技術...

setEmployeeNumber(num); // calls the method that sets the employee number to the value of num

在你的代碼的地方假設你有這樣的

public void setEmployeeNumber(String num) //setter with param num 
{ 
    employeeNumber= num;  //assign value of num to employeeNumber 
}

來源

2016-02-20 21:46:07

的方法setEmployeeNumber(String e)最有可能用於設置唯一的字母 - 數字編號（包含AZ & 0-9）。所有你需要評論的東西就像//assign employeeNumber to e。

來源

2016-05-13 22:01:22 TheBigShaneyM

有人可以請解釋這部分代碼的含義是什麼？ setEmployeeNumber（num）

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