如何在另一个对象构造函数中初始化对象变量(更多详细信息)

Question

我还是个初学者，所以放松一下。

我有5节课，但我的问题只需要2节课。这是我作业中的一个问题，所以不必太过挑剔。我的任务是制作一个java终端系统来存储和显示讲师(兼职和全职(、讲师地址和课程信息。

我的代码将检查是否有兼职讲师要显示(这包括地址对象，因为它是讲师信息的一部分(。如果没有，它将提示用户输入兼职讲师的详细信息。在输入兼职详细信息时，我不确定如何在不重新创建对象的情况下输入地址。这是我的代码

这是非全日制

public class PartTime extends Lecturer{
private double hourlyRate;
private int hoursWorked;
//classR = class resposible
private ClassInfo classR;

PartTime(){
classR = new ClassInfo();
}
PartTime(String staffNo, String name, int contactNo, int noClasses, Address add, double hourlyRate, int hoursWorked, ClassInfo classR){
super(staffNo, name, contactNo, noClasses, add);
this.hourlyRate = hourlyRate;
this.hoursWorked = hoursWorked;
this.classR = classR;
}
public double getHourlyRate(){
return this.hourlyRate;
}
public int getHoursWorked(){
return this.hoursWorked;
}
public void setHourlyRate(double newHourlyRate){
this.hourlyRate = newHourlyRate;
}
public void setHoursWorked(int newHoursWorked){
this.hoursWorked = newHoursWorked;
}

public void displayClassR(){
System.out.println("Class No           : "+ classR.getClassNo());
System.out.println("Subject Name       : "+ classR.getSubjectName());
System.out.println("Number Of Students : "+ classR.getNoStudents());
System.out.println("Start Date         : "+ classR.getStartDate());
System.out.println("End Date           : "+ classR.getEndDate());
}
}

这是讲师班

public class Lecturer{
private String staffNo, name;
private int contactNo, noClasses;
private final Address add;
Lecturer(){
add = new Address();
}
Lecturer(String staffNo, String name, int contactNo, int noClasses, Address add){
this.staffNo = staffNo;
this.name = name;
this.contactNo = contactNo;
this.noClasses = noClasses;
this.add = add;
}
public String getStaffNo(){
return this.staffNo;
}
public String getName(){
return this.name;
}
public int getContactNo(){
return this.contactNo;
}
public int getNoClasses(){
return this.noClasses;
}
public void displayAdd(){
System.out.println("Unit Number : "+ add.getUnitNo());
System.out.println("Street Name : "+ add.getStreetName());
System.out.println("City        : "+ add.getCity());
System.out.println("Postcode    : "+ add.getPostcode());
}
public void setStaffNo(String newStaffNo){
this.staffNo = newStaffNo;
}
public void setName(String newName){
this.name = newName;
}
public void setContactNo(int newContactNo){
this.contactNo = newContactNo;
}
public void setNoClasses(int newNoClasses){
this.noClasses = newNoClasses;
}
public void setAdd(String newUnitNo, String newStreetName, String newCity, int newPostcode){
add.setUnitNo(newUnitNo);
add.setStreetName(newStreetName);
add.setCity(newCity);
add.setPostcode(newPostcode);
}
}

您可以忽略菜单部分

import java.io.*;
class Main{
static Scanner scan = new Scanner(System.in);
static Address add = new Address();
static ClassInfo classI = new ClassInfo();
static FullTime ft = new FullTime();
static PartTime pt = new PartTime();
static String staffNo, name, classNo, subjectName, startDate, endDate, unitNo, streetName, city;
static int contactNo, noClasses, hoursWorked, noStudents, postcode, select;
static double annualSalary, hourlyRate;
public static void main(String[] args){
//menu looping
do{
System.out.println("=======================");
System.out.println("|      Main Menu      |");
System.out.println("|   Select an option  |");
System.out.println("|    1. Lecturer      |");
System.out.println("|    2. Class Info    |");
System.out.println("|    3. File Actions  |");
System.out.println("|    0. Exit          |");
System.out.println("=======================");

select = scan.nextInt();
switch(select){
case 1:
lecturerMenu();
break;
case 2:
classInfoMenu();
break;
case 3:
fileMenu();
case 0:
System.out.println("Exiting...");
System.exit(0);
break;
default:
System.out.println("Error please select again");
}
}while(select !=0);

}

最终，它将进入用户添加兼职讲师数据的部分。这套不完整，因为我不知道如何做地址部分

public static void newPartTime(){

System.out.println("Enter Part Time Lecturer Details");
System.out.print("Enter Staff Number: ");
scan.nextLine();
staffNo = scan.nextLine();
System.out.print("Enter Name: ");
name = scan.nextLine();
System.out.print("Enter Contact Number: ");
contactNo = scan.nextInt();
System.out.print("Enter Hourly Rate: ");
hourlyRate = scan.nextDouble();
System.out.print("Enter Hours Worked: ");
hoursWorked = scan.nextInt();
System.out.println("Enter Address");
System.out.print("Enter Unit Number: ");
scan.nextLine();
unitNo = scan.nextLine();
System.out.print("Enter Street Name: ");
streetName = scan.nextLine();
System.out.print("Enter City: ");
city = scan.nextLine();
System.out.print("Enter Postcode: ");
postcode = scan.nextInt();
scan.nextLine();
if(classI == null){
System.out.println("There is no class available. Please add a new class");
newClassInfo();
}else{
pt.setStaffNo(staffNo);
pt.setName(name);
pt.setContactNo(contactNo);
pt.setNoClasses(noClasses);
pt.set
}
}
}

通常情况下，我会在申报时这样做：

static FullTime ft = new FullTime(var1, var1 ,var3, address);

我能重新创建对象吗？还是应该添加一个方法来设置地址？

Answer 1

您可以创建一个地址类的Object并设置值，然后将该对象设置为您的兼职对象。