payroll system

这个学期《面向对象技术》课程设计比较有意思，给我安排的是一个工资表系统。

以前没学过JAVA，这次正好趁这个机会好好实践一下。

本来想好好做的，不过由于杂事太多，而且要翻译一个死长死长的论文，所以本来真正要好好做的东西没有留下时间做 。

以下是我的部分代码，只是对该系统的一个初步设计

 

//雇员抽象类
public abstract class Employee
{
 private String Name;
 private String Password;
 
 public Employee(String name)
 {
  Name = name;
 }
 
 public String getName() {return Name;}
 public String toString()
 {
  return Name;
 }
 
 public abstract double earnings();
}

 

//佣金型雇员
public final class CommissionEmployee extends Employee
{
// private double salary;
 private double commissionrate;
 private double commission;
 private int quantity;
 
 public CommissionEmployee(String name, double c, int choice, int q)
 {
  super(name);
//  setSalary(s);
  setCommissionrate(choice);
  setCommission(c);
  setQuantity(q);
 }
 
// public void setSalary(double s)
// {salary = (s > 0 ? s : 0);}
 
 public void setQuantity(int q)
 {quantity = (q > 0 ? q : 0);}
 
 public void setCommissionrate(int choice)
 {
  switch(choice){
  case 1:
   commissionrate = 0.10;
   break;
  case 2:
   commissionrate = 0.15;
   break;
  case 3:
   commissionrate = 0.25;
   break;
  default:
   commissionrate = 0.35;
  }
 }
 
 public void setCommission(double c)
 {commission = (c > 0 ? c : 0);}
 
 public double earnings()
 {return commission * commissionrate * quantity;}
 
 public String toString()
 {
  return "CommissionEmployee:" + super.toString();
 }
}

//月薪制雇员

public final class FlatSalaryEmployee extends Employee
{
 private double monthlySalary;
 
 public FlatSalaryEmployee(String name,double s)
 {
  super(name);
  setMonthlySalary(s);
 }
 
 public void setMonthlySalary(double s)
 {monthlySalary = (s > 0 ? s: 0);}
 
 public String toString()
 {
  return "FlatSalaryEmployee:" + super.toString();
 }
 public double earnings() {return monthlySalary;}
}

//小时计费型雇员

public final class HourlyEmployee extends Employee{
 private double wage;
 private double hours;
 
 public HourlyEmployee(String name, double w, double h)
 {
  super(name);
  setWage(w);
  setHours(h);
 }
 
 public void setWage(double w)
 {wage = (w > 0 ? w : 0);}
 
 public void setHours(double h)
 {hours = (h >= 0 && h < 168 ? h : 0);}
 
 public double earnings()
 {
  if (hours < 8)
   return wage * hours * 5;
  else
   return (wage * 8 + 1.5 * wage * (hours - 8)) * 5;
 }
 
 public String toString()
 {
  return "HourlyEmployee:" + super.toString();
 }
}

//主程序

import javax.swing.JOptionPane;
import java.text.DecimalFormat;

public class PayrollTest {

 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  Employee ref;
  String output = "";
  
  FlatSalaryEmployee f =
   new FlatSalaryEmployee("John Smith", 3000.00);
  HourlyEmployee h =
   new HourlyEmployee("Karen Price", 20.50, 10);
  CommissionEmployee c =
   new CommissionEmployee("Sue Jones", 3.0, 3, 1500);
  
  DecimalFormat precision2 = new DecimalFormat("0.00");
  
  ref = f;
  output += ref.toString() + " earned $" +
     precision2.format(ref.earnings()) + "/n" +
     f.toString() + " earned $" +
     precision2.format(f.earnings()) + "/n";
  
  ref = c;
  output += ref.toString() + " earned $" +
     precision2.format(ref.earnings()) + "/n" +
     c.toString() + " earned $" +
     precision2.format(c.earnings()) + "/n";
  
  ref = h;
  output += ref.toString() + " earned $" +
     precision2.format(ref.earnings()) + "/n" +
     h.toString() + " earned $" +
     precision2.format(h.earnings()) + "/n"; 
  
  JOptionPane.showMessageDialog(null, output,
    "Payroll",
    JOptionPane.INFORMATION_MESSAGE);
  System.exit(0);
 }

}