第十五次JAVA作业
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
课后作业
• 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 feige; 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 double getSalary(int month){ return 0; } }
package feige; public class SalariedEmployee extends ColaEmployee { int money; public SalariedEmployee() { super(); } public SalariedEmployee(String name,int month,int money) { super(name,month); this.money = money; } public double getSalary(int month){ if(super.month==month){ return money+100; }else{ return money; } } }
package feige; public class HourlyEmployee extends ColaEmployee{ int hmoney; int mday; public HourlyEmployee(){ super(); } public HourlyEmployee(String name,int month,int hmoney, int mday) { super(); this.hmoney = hmoney; this.mday = mday; } public double getSalary(int month){ if(super.month==month){ if(mday>160){ return hmoney*160*(mday-160)*1.5+100; }else{ return hmoney * mday + 100; } }else{ if(mday>160){ return hmoney*160+(mday-160)*1.5; }else{ return hmoney*mday; } } }
package feige; public class SalesEmployee extends ColaEmployee { int monthlysales; double royaltyrate; public SalesEmployee(String name, int month, int monthlysales, double royaltyrate) { super(); this.monthlysales = monthlysales; this.royaltyrate = royaltyrate; } public double getSalary(int month){ if(super.month==month){ return monthlysales*royaltyrate+100; }else{ return monthlysales*royaltyrate; } } }
package feige; public class Copany extends ColaEmployee { public void getSalary(ColaEmployee c,int month){ System.out.println(c.name+"在"+month+"月的月薪为"+c.getSalary(month)+"元"); } }
package feige; public class Testcompany { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub ColaEmployee c1[]={new SalariedEmployee("salare",4,70000), new HourlyEmployee("hourlye",4,200,30), new SalesEmployee("salese",4,17000,0.7) }; for (int i = 0; i < c1.length; i++) { new Copany().getSalary(c1[i], 4); } } }
课后作业
• 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
package baobao; public class Apple implements Fruit { public Apple() { System.out.println("创建了一个苹果对象"); } }
package baobao; public class Banana implements Fruit{ public Banana() { System.out.println("创建了一个香蕉对象"); } }
package baobao; public class Pear implements Fruit{ public Pear() { System.out.println("创建了一个梨对象"); } }
package baobao; interface Fruit { }
package baobao; import java.util.Scanner; public class Gardener { public static void main(String[] args) { Gardener g = new Gardener(); g.create(); } private Fruit create() { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.println("请输入水果名称"); String name = input.next(); Fruit a = null; if (name.equals("苹果")) { a = new Apple(); } else if (name.equals("香蕉")) { a = new Banana(); } else if (name.equals("葡萄")) { a = new Pear(); } else { System.out.println("没有这个水果"); } return a; } }