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。
public class ColaEmployee { protected String name; protected int month; public ColaEmployee() { super(); } public double getSalary(int month) { return 0; } public ColaEmployee(String name, int month) { super(); this.n = n; this.m = m; } public String getN() { return name; } public void setN(String n) { this.n = n; } public int getM() { return m; } public void setM(int m) { this.m = m; } } public class SalariedEmployee extends ColaEmployee{ protected double yuexin; public SalariedEmployee() { super(); } public SalariedEmployee(String n, int m, double yuexin) { super(n, m); this.yuexin = yuexin; } public double getSalary(int m) { if (super.m == m) { return yuexin + 100; } else { return yuexin; } } } public class HourlyEmployee extends ColaEmployee { protected int gongzi; protected int xiaoshi; public HourlyEmployee() { super(); } public HourlyEmployee(String n, int m, int gongzi, int xiaoshi) { super(n, m); this.gongzi = gongzi; this.xiaoshi = xiaoshi; } public double getSalary(int m) { if (super.m == m) { if (xiaoshi > 160) { return gongzi * 160 + gongzi * (xiaoshi - 160) * 1.5 + 100; } else { return gongzi * xiaoshi + 100; } } else { if (xiaoshi > 160) { return gongzi * 160 + gongzi * (xiaoshi - 160) * 1.5; } else { return gongzi * xiaoshi; } } } } public class SalesEmployee extends ColaEmployee { protected int yuexiao; protected double ticheng; public SalesEmployee() { super(); } public SalesEmployee(String n, int m, int yuexiao, double ticheng) { super(n, m); this.yuexiao = yuexiao; this.ticheng = ticheng; } public double getSalary(int m) { if (super.m == m) { return yuexiao * ticheng + 100; } else { return yuexiao * ticheng; } } } public class Company { public void getSalary(ColaEmployee a, int m){ System.out.println(a.n+ "在" + m + "月的月薪为" + a.getSalary(month)+ "元"); } } public class Test { public static void main(String[] args) { ColaEmployee a1[] = { new SalariedEmployee("张明", 3, 10000), new HourlyEmployee("李四", 6, 6, 1200), new SalesEmployee("张三", 9, 1600, 9.0) }; for (int i = 0; i < a1.length; i++) { new Company().getSalary(a1[i],8); } } }
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 abc; import java.util.Scanner; public class abc { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub garderner g = new garderner(); g.creat(); } } 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 garderner{ public fruit creat() { fruit f = null; Scanner input = new Scanner(System.in); String name = input.next(); if(name.equals("苹果")) { f = (fruit) new apple(); } if(name.equals("香蕉")) { f = (fruit) new banana(); } if(name.equals("葡萄")) { f = (fruit) new putao(); } return f; } } interface fruit{ }