作业5(抽象类作业)含答案.doc

1.编写程序计算公司的工资单，公司的雇员,执行总裁CEO，委托雇员CommissionedEmployee(其薪水由基本周薪-周内销售的每一项的特定数量来决定)和计件雇员PiecedEmployee(其薪水由他们一周内生产的每件产品的特定数量来决定)组成。提示：定义Employee抽象类，在Employee抽象类中定义计算雇员的抽象方法payment(),CEO,CommissionedEmployee和PiecedEmployee类继承Employee，实现payment()方法。实现全公司发放工资package ;public class CEO extends Employee public CEO( String name )super( name );System.out.println( -有参 + name );public CEO()public void payment()System.out.println( getName() + 工资：10元每小时 );package ;public class CommissionedEmployee extends Employee public CommissionedEmployee( String name )super( name );System.out.println( -有参 + name );public CommissionedEmployee()public void payment()System.out.println( getName() + 工资：6元每小时 );package ;public class PiecedEmployee extends Employee public PiecedEmployee( String name )super( name );System.out.println( -有参 + name );public PiecedEmployee()public void payment()System.out.println( getName() + 工资：5元每小时 );package ;public abstract class Employee private String name;public String getName() return name;public void setName(String name) = name;public Employee( String name ) = name;public Employee()public abstract void payment();package .test;import .CEO;import .CommissionedEmployee;import .Employee;import .PiecedEmployee;public class TestEmployee /* * param args */public static void main(String args) / TODO Auto-generated method stubEmployee e = new PiecedEmployee( PiecedEmployee );if( e instanceof CEO )CEO ceo = (CEO)e;ceo.payment();else if( e instanceof CommissionedEmployee )CommissionedEmployee ce = (CommissionedEmployee)e;ce.payment();elsePiecedEmployee pe = (PiecedEmployee)e;pe.payment();2 抽象类：创建一个Vehicle类并将它声明为抽象类。在Vehicle类中声明一个NoOfWheels方法，使它返回一个字符串值。创建两个类Car和Motorbike从Vehicle类继承，并在这两个类中实现NoOfWheels方法。在Car类中，应当显示“四轮车”信息；而在Motorbike类中，应当显示“双轮车”信息。创建另一个带main方法的类，在该类中创建Car和Motorbike的实例，并在控制台中显示消息。package m;public abstract class Vehicle private String name;public Vehicle( String name ) = name;public Vehicle()public String getName() return name;public void setName(String name) = name;public abstract void NoOfWheels();package m;public class Car extends Vehicle public Car( String name )super( name );System.out.println( -有参- + name );public Car()Overridepublic void NoOfWheels() / TODO Auto-generated method stubSystem.out.println( 我是 + getName() + ,我有四个轮子 );package m;public class Motorbike extends Vehicle public Motorbike( String name )super( name );System.out.println( -有参- + name );public Motorbike()Overridepublic void NoOfWheels() / TODO Auto-generated method stubSystem.out.println( 我是 + getName() + ,我有两个个轮子 );package .test2;import m.Car;import m.Motorbike;import m.Vehicle;public class TestVehicle /* * param args */public static void main(String args) / TODO Auto-generated me