factorysystem.java

一个简单的职工数据库系统设计

				}
				//&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
				public void displayMenu()
				{
					//-------------------------------------------------------------------
					//函数功能：显示菜单功能起提示作用。
				  //函数参数：无。
					//------------------------------------------------------------------------
							System.out.println("0:Quit");
							System.out.println("1:Calculate payroll");
							System.out.println("2:Search for employee");
				}
}
//=================================================================================
//程序启动类。
//=================================================================================
public class FactorySystem
{
	    private MenuChoice menud=null;
	    private sheffield.EasyReader kbd=null;
	    //&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
			public static void main(String [] args)
			{
				//---------------------------------------------------------------------------
				//函数功能：启动程序。变量factorysys为启动类的对象。
				//factorysys.runfactorySystem()运行程序功能。
				//--------------------------------------------------------------------------
				  FactorySystem factorysys = new FactorySystem();
				  if(factorysys==null)
				  {
				  		System.out.println("FactorySystem对象内存分配失败！！！");
				  		System.exit(0);
				  }
				 try				 
				 {
				 		factorysys.runfactorySystem();
				 }
				 catch(NullPointerException f)
				{
					//System.out.println("aaaaaa");
					f.printStackTrace();					
				}
				catch(Exception e)
				{
					e.printStackTrace();
				}	
			}	
			//&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
			public void runfactorySystem() throws NullPointerException,Exception
			{
				//-----------------------------------------------------------------------------
				//函数功能：启动运行菜单对象。menud为菜单类对象。对象kbd在此处为功能是
				//接受一个int型的变量。menud.setChoiceNumber(choicenumber)设置菜单的选择
				//menud.choiceMenu()运行菜单。
				//-----------------------------------------------------------------------------
					menud= new MenuChoice();	
				  kbd= new sheffield.EasyReader();			
					System.out.println("Welcome to the factory syatem");	
					//menud.displayMenu();				
					while(true)
					{												
								if(kbd==null || menud==null)
								     throw new NullPointerException();
								menud.displayMenu();
		            int choicenumber=kbd.readInt("number of items(MAX 20):");
		            if(choicenumber==0)
		            {
		            		System.out.println("Goodbye!");
		            		System.out.println("Hope you enjoyed the factory system.");
		            		System.exit(0);
		            }
								menud.setChoiceNumber(choicenumber);
								try{
											menud.choiceMenu();
										}
								catch(Exception e)
								{
									e.printStackTrace();
								}
					}				
			}
}
//================================================================================
//职员类，有两个属性name、position初始化为unknow。有两个方法 getname()返回对象的name;
//方法showpayroll打印对象的信息.
//=================================================================================
class Employee
{
	  public static int iOrder=0;
	  protected int everyOrder=0;
		protected String sName="unknow";
		protected String sPosition="unknow";		
		public Employee(String name,String position)
		{
				iOrder++;
				everyOrder=iOrder;
				this.sName=name;
				this.sPosition=position;
		}
		public String getName()
		{
			//------------------------------------------------------------------
			//函数功能:返回对象的名字.
			//参数:无.
			//-------------------------------------------------------------------
			return sName;
		}
		public void  calculatePayment()
		{
		}
		public String getPosition()
		{
			//-------------------------------------------------------------------
			//
			//------------------------------------------------------------------------
				return sPosition;
		}
		public void showPayroll()
		{
			//-----------------------------------------------------------------------
			//函数功能:打印对象信息.
			//
			//------------------------------------------------------------------------
				System.out.print(""+everyOrder+" :("+sName+" "+sPosition+")");
		}		
}
//===================================================================================
//类WagedEmployee是employee的子类,它有三个属性dHoursworked是工作的时间数,dPaymentPerHour是每小时
//工作的报酬.payment是每周的报酬.有三个方法.方法setTimeAndPaymentPerHour设置对象的工作
//时间和每小时的工作报酬.方法calculatePayment根据对象的每周的工作时间和每小时的工作报酬
//计算出一周的报酬.方法showPayroll覆盖父类showPayroll函数打印对象的信息.
//===================================================================================
class WagedEmployee extends Employee
{
	  protected double  dHoursworked=-1f;
		protected double dPaymentPerHour=-1f;
		protected double payment=-1f;
		public WagedEmployee(String name,String position,double hour,double paymentperhour)
		{
				super(name,position);
				this.dHoursworked=hour;
				this.dPaymentPerHour=paymentperhour;
		}
		public void setTimeAndPaymentPerHour(double hour,double paymentperhour)
		{
			//----------------------------------------------------------------------
			//函数功能:设置对象的每周工作时间和每小时的工作报酬.
			//----------------------------------------------------------------------
				this.dHoursworked=hour;
				this.dPaymentPerHour=paymentperhour;
		}
		public void  calculatePayment()
		{
			//---------------------------------------------------------------------------
			//函数功能:计算WagedEmployee的每周工资.
			//---------------------------------------------------------------------------
				payment=dPaymentPerHour*dHoursworked;
		}
		public void showPayroll()
		{
			//--------------------------------------------------------------------------
			//覆盖父类showPayroll函数打印对象的信息.
			//-----------------------------------------------------------------------------
			payment=dPaymentPerHour*dHoursworked;
			System.out.println(""+everyOrder+" :("+sName+" "+sPosition+","+dHoursworked+" hours@"+dPaymentPerHour+" per hour ="+payment+")");
		}
}
//================================================================================
//类Manager是employee的子类,它有一个属性dWeeklyPayment是Manager对象的每周工资,有一个方法
//showPayroll()覆盖父类showPayroll函数打印对象的信息.
//=================================================================================
class Manager extends Employee
{
		double dWeeklyPayment=-1;
		public Manager(String name,String position,double weeklypayment)
		{
				super(name,position);
				this.dWeeklyPayment=weeklypayment;
		}
		public void showPayroll()
		{
			//------------------------------------------------------------------------
			//覆盖父类showPayroll函数打印对象的信息.
			//-------------------------------------------------------------------------
				System.out.println(""+everyOrder+" :("+sName+" "+sPosition+","+dWeeklyPayment+")");
		}
}
class SalesPerson extends WagedEmployee
{
		private int isaleProductNumber=-1;
		private double dCommission=-1;
		public SalesPerson(String name,String position,double hour,double paymentperhour,
		                int saleproductnumber,double commission)
		{
				super(name,position,hour,paymentperhour);
				this.isaleProductNumber=saleproductnumber;
				this.dCommission=commission;
		}
		public void  calculatePayment()
		{
			//---------------------------------------------------------------------------
			//函数功能:计算WagedEmployee的每周工资.
			//---------------------------------------------------------------------------
			payment=dPaymentPerHour*dHoursworked+dCommission*isaleProductNumber;
		}
		public void setSaleProductNumberAndcommission(int salenumber,double commission)
		{
			  this.isaleProductNumber=salenumber;
				this.dCommission=commission;
		}
		public void showPayroll()
		{
			//--------------------------------------------------------------------------
			//覆盖父类showPayroll函数打印对象的信息.
			//-----------------------------------------------------------------------------
			payment=dPaymentPerHour*dHoursworked+dCommission*isaleProductNumber;
			System.out.println(""+everyOrder+" :("+sName+" "+sPosition+","+dHoursworked+" hours@"
			+dPaymentPerHour+" per hour "+isaleProductNumber+"sales @"+dCommission+"commission="+payment+")");
		}
}