【发布时间】：2014-04-13 00:16:47
【问题描述】：
我被要求创建一个名为 listOfWorkers 的方法，在该方法中，我将通过从文件“workers.txt”中读取数据来创建我拥有的 3 个工作人员的每种类型的对象，然后将对象存储到类型为 ArrayList 中工人并返回它。我已经设法通过从文件中读取数据来制作 3 个工作人员的每种类型的对象，但现在我不知道如何将它们存储到 ArrayList 中。有帮助吗？
我现在正在编写的课程
import java.util.*;
import java.io.*;
public class WorkerBenefits
{
public ArrayList<Worker> listOfWorkers()
{
try
{
File ifile = new File("worker.txt");
Scanner scan = new Scanner(ifile);
while (scan.hasNextLine())
{
String line = scan.nextLine();
StringTokenizer st = new StringTokenizer(line,",");
String jobs = st.nextToken();
Jobs jobType = Jobs.valueOf(jobs);
//Engineer Object type
if (jobType == Jobs.ELECTRICAL_ENGINEER || jobType == Jobs.MECHANICAL_ENGINEER)
{
String name = st.nextToken();
String str1 = st.nextToken();
int social = Integer.parseInt(str1);
String str2 = st.nextToken();
int years = Integer.parseInt(str2);
String str3 = st.nextToken();
double weeklyBen = Double.parseDouble(str3);
Engineer eng = new Engineer(name,social,years,jobType,weeklyBen);
}
//Admin. Person. Object type
else if (jobType == Jobs.ADMINISTRATIVE_SECRETARY || jobType == Jobs.ADMINISTRATIVE_ASSISTANT)
{
String name = st.nextToken();
String str1 = st.nextToken();
int social = Integer.parseInt(str1);
String str2 = st.nextToken();
int years = Integer.parseInt(str2);
String str3 = st.nextToken();
double rate = Double.parseDouble(str3);
String str4 = st.nextToken();
double hours = Double.parseDouble(str4);
AdministrativePersonnel ap = new AdministrativePersonnel(name,social,years,jobType,rate,hours);
}
//Management Object type
else if (jobType == Jobs.ENGINEERING_MANAGER || jobType == Jobs.ADMINISTRATIVE_MANAGER)
{
String name = st.nextToken();
String str1 = st.nextToken();
int social = Integer.parseInt(str1);
String str2 = st.nextToken();
int years = Integer.parseInt(str2);
String str3 = st.nextToken();
double weeklyBen = Double.parseDouble(str3);
String str4 = st.nextToken();
double bonus = Double.parseDouble(str4);
Management mang = new Management(name,social,years,jobType,weeklyBen,bonus);
}
}
}
catch (IOException ioe)
{
System.out.println("Something went wrong");
}
return ArrayList;
}
}
这里是其他类的代码，以防你们需要它们：
工作
public enum Jobs {ELECTRICAL_ENGINEER, MECHANICAL_ENGINEER, ADMINISTRATIVE_SECRETARY, ADMINISTRATIVE_ASSISTANT, ENGINEERING_MANAGER, ADMINISTRATIVE_MANAGER, NONE};
工人
public abstract class Worker
{
public String name;
public int socialSecurity;
private int yearsExperience;
public Jobs et = null;
public static int id = 0;
public int currentID = 0;
public Worker ()
{
name = "AnyName";
socialSecurity = 12345;
yearsExperience = 0;
et = Jobs.NONE;
id++;
currentID = id;
}
public Worker (String n, int ss, int ye, Jobs j)
{
id++;
currentID = id;
name = n;
socialSecurity = ss;
yearsExperience = ye;
et = j;
}
public String getName()
{
return name;
}
public int getSocialSecurity()
{
return socialSecurity;
}
public int getYearsExperience()
{
return yearsExperience;
}
public Jobs getJobs()
{
return et;
}
public void setName(String n1)
{
name = n1;
}
public void setSocialSecurity(int ss1)
{
socialSecurity = ss1;
}
public void setYearsExperience(int ye1)
{
yearsExperience = ye1;
}
public void setJobs(Jobs et1)
{
et = et1;
}
public abstract double benefitsCalculation(Jobs et2);
public String toString()
{
String output = "The name is: " + name + "The Job type is: " + et + "The id is: " + currentID;
return output;
}
}
工程师
public class Engineer extends Worker
{
private double weeklyBenefits;
public Engineer ()
{
super();
weeklyBenefits = 400.00;
}
public Engineer (String n, int ss, int ye, Jobs j, double wb)
{
super(n,ss,ye,j);
weeklyBenefits = wb;
super.setName(n);
super.setSocialSecurity(ss);
super.setYearsExperience(ye);
super.setJobs(j);
}
public double benefitsCalculation(Jobs et2)
{
double benefits = 0.0;
if (et2 == Jobs.ELECTRICAL_ENGINEER)
{
benefits = weeklyBenefits+super.getYearsExperience()*120.00;
}
else if (et2 == Jobs.MECHANICAL_ENGINEER)
{
benefits = weeklyBenefits/2+super.getYearsExperience()*120.00;
}
else if (et2 != Jobs.ELECTRICAL_ENGINEER || et2 != Jobs.MECHANICAL_ENGINEER)
{
benefits = 0;
}
return benefits;
}
public double getWeeklyBenefits()
{
return weeklyBenefits;
}
public void setWeeklyBenefits(double wb)
{
weeklyBenefits = wb;
}
public String toString()
{
String output = "The benefit is " + weeklyBenefits + super.toString();
return output;
}
}
行政人员
public class AdministrativePersonnel extends Worker
{
private double rate;
private double hours;
public AdministrativePersonnel()
{
super();
rate = 10.0;
hours = 10.0;
}
public AdministrativePersonnel(String n, int ss, int ye, Jobs j, double r, double h)
{
super(n,ss,ye,j);
rate = r;
hours = h;
super.setName(n);
super.setSocialSecurity(ss);
super.setYearsExperience(ye);
super.setJobs(j);
}
public double benefitsCalculation (Jobs et2)
{
double benefits = 0.0;
if (et2 == Jobs.ADMINISTRATIVE_SECRETARY)
{
benefits = rate*hours+super.getYearsExperience()*15.00;
}
else if(et2 == Jobs.ADMINISTRATIVE_ASSISTANT)
{
benefits = rate*hours+super.getYearsExperience()*25.00;
}
else if (et2 != Jobs.ADMINISTRATIVE_SECRETARY || et2 != Jobs.ADMINISTRATIVE_ASSISTANT)
{
benefits = 0;
}
return benefits;
}
public double getRate()
{
return rate;
}
public double getHours()
{
return hours;
}
public void setRate(double r1)
{
rate = r1;
}
public void setHours(double h1)
{
hours = h1;
}
public String toString()
{
String output = "The rate is: " + rate + "The hours are: " + hours + super.toString();
return output;
}
}
管理
public class Management extends Worker
{
private double weeklyBenefits;
private double bonus;
public Management()
{
super();
weeklyBenefits = 0.0;
bonus = 0.0;
}
public Management(String n, int ss, int ye, Jobs j, double wb, double b)
{
super(n,ss,ye,j);
weeklyBenefits = wb;
bonus = b;
super.setName(n);
super.setSocialSecurity(ss);
super.setYearsExperience(ye);
super.setJobs(j);
}
public double benefitsCalculation (Jobs et2)
{
double benefits = 0.0;
if (et2 == Jobs.ENGINEERING_MANAGER)
{
benefits = weeklyBenefits+bonus;
}
else if(et2 == Jobs.ADMINISTRATIVE_MANAGER)
{
benefits = weeklyBenefits+0.5*bonus;
}
else if (et2 != Jobs.ENGINEERING_MANAGER || et2 != Jobs.ADMINISTRATIVE_MANAGER)
{
benefits = 0;
}
return benefits;
}
public double getWeeklyBenefits()
{
return weeklyBenefits;
}
public double getBonus()
{
return bonus;
}
public void setWeeklyBenefits(double wb)
{
weeklyBenefits = wb;
}
public void setBonus(double b)
{
bonus = b;
}
public String toString()
{
String output = "The weekly benefits are: " + weeklyBenefits + "The bonus is: " + bonus + super.toString();
return output;
}
}
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标签： java object arraylist abstract-class extends