Java第十五次作业
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 第十五周作业;
public class ColaEmployee {
protected String name;
protected int month;
public ColaEmployee() {
super();
}
public ColaEmployee(String name, int month) {
super();
this.name = name;
this.month = month;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getMonth() {
return month;
}
public void setMonth(int month) {
this.month = month;
}
public double getSalary(int month) {
return 0;
}
}
package 第十五周作业;
public class SalariedEmployee extends ColaEmployee {
double monSalary;// 月薪
public SalariedEmployee() {
super();
}
public SalariedEmployee(String name, int month, double monSalary) {
super(name, month);
this.monSalary = monSalary;
}
public double getSalary(int month) {
if (super.getMonth() == month) {
return monSalary + 100;
} else {
return monSalary;
}
}
}
package 第十五周作业;
public class HourlyEmployee extends ColaEmployee {
int hourSalary;// 时薪
int hourNum;// 每月工作的小时数
public HourlyEmployee() {
super();
}
public HourlyEmployee(String name, int month, int hourSalary, int hourNum) {
super(name, month);
this.hourSalary = hourSalary;
this.hourNum = hourNum;
}
public double getSalary(int month) {
if (super.getMonth() > month) {
if (hourNum > 160) {
return hourSalary * 160 + hourSalary * (hourNum - 160) * 1.5
+ 100;
} else {
return hourSalary * hourNum + 100;
}
} else {
if (hourNum > 160) {
return hourSalary * 160 + hourSalary * (hourNum - 160) * 1.5;
} else {
return hourSalary * hourNum;
}
}
}
}
package 第十五周作业;
public class SalesEmployee extends ColaEmployee {
int monthSales;// 月销售额
double royaltyRate;// 提成率
public SalesEmployee() {
super();
}
public SalesEmployee( String name,int month, int monthSales,
double royaltyRate) {
super(name, month);
this.monthSales = monthSales;
this.royaltyRate = royaltyRate;
}
public double getSalary(int month) {
if (super.getMonth() == month) {
return monthSales * royaltyRate + 100;
} else {
return monthSales * royaltyRate;
}
}
}
package 第十五周作业;
public class Company {
public void getSalary(ColaEmployee c, int month) {
System.out.println(c.name + "在" + month + "月的月薪为" + c.getSalary(month)+ "元");
}
}
package 第十五周作业;
public class TestCompany {
public static void main(String[] args) {
// 创建、初始化数组
ColaEmployee[] cel = {
new SalariedEmployee("salariedEmployee", 6, 30000),// name,month,月薪
new HourlyEmployee("hourlyEmployee", 5, 100, 300),// name,month,时薪,小时数
new SalesEmployee("salesEmployee", 3, 500000, 0.3) // name,month,月销售额,提成率
};
// 数组遍历
for (int i = 0; i < cel.length; i++) {
new Company().getSalary(cel[i], 10);
}
}
}

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‖);
}
}
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
package 第十五周作业;
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 Putao implements Fruit {
public Putao() {
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 Putao();
} else {
System.out.println("不会种");
}
return f;
}
}
package 第十五周作业;
public class Test2 {
/**
* @param args
*/
public static void main(String[] args) {
Gardener g = new Gardener();
g.create();
}
}



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