第十五周作业
4、 Cola公司的雇员分为以下若干类：(知识点：多态) [必做题]
4.1 ColaEmployee ：这是所有员工总的父类，属性：员工的姓名,员工的生日月份。方法：getSalary(int month) 根据参数月份来确定工资，如果该月员工过生日，则公司会额外奖励100 元。
4.2 SalariedEmployee ： ColaEmployee 的子类，拿固定工资的员工。属性：月薪
4.3 HourlyEmployee ：ColaEmployee 的子类，按小时拿工资的员工，每月工作超出160 小时的部分按照1.5 倍工资发放。属性：每小时的工资、每月工作的小时数
4.4 SalesEmployee ：ColaEmployee 的子类，销售人员，工资由月销售额和提成率决定。属性：月销售额、提成率
4.5 定义一个类Company，在该类中写一个方法，调用该方法可以打印出某月某个员工的工资数额，写一个测试类TestCompany,在main方法，把若干各种类型的员工放在一个ColaEmployee 数组里，并单元出数组中每个员工当月的工资。
package oop;
public abstract class ColaEmployee {
String Ename;
int Emonth;
public abstract double getSalary(int month);
public String getEname() {
return Ename;
}
public void setEname(String ename) {
Ename = ename;
}
public int getEmonth() {
return Emonth;
}
public void setEmonth(int emonth) {
Emonth = emonth;
}
public ColaEmployee(String ename, int emonth) {
super();
Ename = ename;
Emonth = emonth;
}
}
package oop;
public class SalariedEmployee extends ColaEmployee{
double MSalary;
public SalariedEmployee(String ename, int emonth, double mSalary) {
super(ename, emonth);
MSalary = mSalary;
}
@Override
public double getSalary(int month) {
// TODO Auto-generated method stub
if(month==super.Emonth){
return (MSalary+100);
}else{
return MSalary;
}
}
}
public class HourlyEmployee extends ColaEmployee{
double HSalary;
double MHour;
public HourlyEmployee(String ename, int emonth, double hSalary, double mHour) {
super(ename, emonth);
HSalary = hSalary;
MHour = mHour;
}
public double getSalary(int month) {
if (super.Emonth == month) {
if (MHour > 160) {
return HSalary * 160 + HSalary * (MHour - 160) * 1.5 + 100;
} else {
return HSalary * MHour + 100;
}
} else {
if (MHour > 160) {
return HSalary * 160 + HSalary * (MHour - 160) * 1.5;
} else {
return HSalary * MHour;
}
}
}
}
public class SalesEmployee extends ColaEmployee{
double MNum;
double TiChengLv;
public SalesEmployee(String ename, int emonth, double mNum, double tiChengLv) {
super(ename, emonth);
MNum = mNum;
TiChengLv = tiChengLv;
}
public double getSalary(int month){
if(super.Emonth==month){
return MNum*TiChengLv+100;
}else{
return MNum*TiChengLv;
}
}
}
package oop;
public class Company {
public void getSalary(ColaEmployee c, int month) {
System.out
.println(c.Ename + month + "月的月薪为" + c.getSalary(month) + "元");
}
}
public class TestCompany {
/**
* @param args
*/
public static void main(String[] args) {
ColaEmployee c[] = { new SalariedEmployee("小刘", 1, 1000),
new HourlyEmployee("小金", 8, 110, 100),
new SalesEmployee("小仙", 2, 30000, 0.56) };
for (int i = 0; i < c.length; i++) {
new Company().getSalary(c[i], 1);
}
}
}
• 5、利用接口实现动态的创建对象[选做题]
• 5.1 创建4个类：
• 苹果
• 香蕉
• 葡萄
• 园丁
• 5.2 在三种水果的构造方法中打印一句话.
• 以苹果类为例
• class apple
• {
• public apple()
• {
• System.out.println(―创建了一个苹果类的对象‖);
}
• }
课后作业
• 类图如下：
• 5.3 要求从控制台输入一个字符串，根据字符串的
值来判断创建三种水果中哪个类的对象
import java.util.Scanner;
public interface Fruit {
}
class Apple implements Fruit {
public Apple() {
System.out.println("创建了一个苹果对象");
}
}
class Banana implements Fruit {
public Banana() {
System.out.println("创建了一个香蕉对象");
}
}
class Grape implements Fruit {
public Grape() {
System.out.println("创建了一个葡萄对象");
}
}
class Gardener {
public Fruit create() {
Fruit f = null;
Scanner input = new Scanner(System.in);
String name = input.next();
if (name.equals("苹果")) {
f = new Apple();
} else if (name.equals("香蕉")) {
f = new Banana();
} else if (name.equals("葡萄")) {
f = new Grape();
} else {
System.out.println("no");
}
return f;
}
}
public class TestFruit {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Gardener g = new Gardener();
g.create();
}
}
public class TestCompany { /** * @param args */ public static void main(String[] args) { ColaEmployee c[] = { new SalariedEmployee("小刘", 1, 1000), new HourlyEmployee("小金", 8, 110, 100), new SalesEmployee("小仙", 2, 30000, 0.56) }; for (int i = 0; i < c.length; i++) { new Company().getSalary(c[i], 1); } } }
