- 设计三个类,分别如下:(知识点:抽象类及抽象方法) [必做题]
- 3.1 设计Shape表示图形类,有面积属性area、周长属性per,颜色属性clr,有两个构造方法(一个是默认的、一个是为颜色赋值的),还有3个抽象方法,分别是:getArea计算面积、getPer计算周长、shwAll输出所有信息,还有一个求颜色的方法getClr。
- 3.2 设计 2个子类:
- 3.2.1 Rectangle表示矩形类,增加两个属性,Width表示长度、height表示宽度,重写getPer、getArea和shwAll三个方法,另外又增加一个构造方法(一个是默认的、一个是为高度、宽度、颜色赋值的)。
- 3.2.2 Circle表示圆类,增加1个属性,radius表示半径,重写getPer、getArea和shwAll三个方法,另外又增加两个构造方法(为半径、颜色赋值的)。
- 3.3 在main方法中,声明创建每个子类的对象,并调用2个子类的shwAll方法
1 package test; 2 3 public class Shape { 4 double area; 5 double per; 6 char color; 7 public Shape() { 8 super(); 9 } 10 public Shape(char color) { 11 super(); 12 this.color = color; 13 } 14 }
1 package test; 2 3 public class Rectangle extends Shape { 4 public double getPer() { 5 // TODO Auto-generated method stub 6 return (width + height) * 2; 7 } 8 9 public double getArea() { 10 // TODO Auto-generated method stub 11 return width * height; 12 } 13 14 double width; 15 double height; 16 17 public Rectangle(double width, double height, char color) { 18 super(); 19 this.width = width; 20 this.height = height; 21 this.color = color; 22 } 23 24 public Rectangle() { 25 super(); 26 } 27 public void showAll() { 28 System.out.println("矩形的长是" + width + ",宽是" + height + ",颜色是" + color + ",周长是" + getPer() + ",面积是" + getArea()); 29 } 30 31 } 32 33 34 package test; 35 36 public class Circle extends Shape{ 37 double radius; 38 39 public void showAll(){ 40 System.out.println("圆形的半径是"+radius+",颜色是"+color+",周长是"+getPer()+",面积是"+getArea()); 41 } 42 public double getPer() { 43 // TODO Auto-generated method stub 44 return 2*3.14*radius; 45 } 46 public double getArea() { 47 // TODO Auto-generated method stub 48 return 3.14*radius*radius; 49 } 50 public Circle(double radius,char color) { 51 super(); 52 this.radius = radius; 53 this.color=color; 54 } 55 56 } 57 58 59 package test; 60 61 public class Test { 62 63 public static void main(String[] args) { 64 // TODO Auto-generated method stub 65 Rectangle r = new Rectangle(2, 3, '黑'); 66 r.showAll(); 67 Circle c = new Circle(4, '红'); 68 c.showAll(); 69 70 } 71 72 } 73 74

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
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法,把若干各种类型的员工在一个 ColaEmployee 数组里,并单元出数组中每个员工当月的工资。资的员工。属性:月薪
//ColaEmployee类
1 package test; 2 3 public class ColaEmployee { 4 protected String name; 5 protected int month; 6 7 public ColaEmployee() { 8 super(); 9 } 10 11 public ColaEmployee(String name, int month) { 12 super(); 13 this.name = name; 14 this.month = month; 15 } 16 17 public int getMonth() { 18 return month; 19 } 20 21 public double getSalary(int month) { 22 return 0; 23 } 24 }package test; 25 26 public class ColaEmployee { 27 protected String name; 28 protected int month; 29 30 public ColaEmployee() { 31 super(); 32 } 33 34 public ColaEmployee(String name, int month) { 35 super(); 36 this.name = name; 37 this.month = month; 38 } 39 40 public int getMonth() { 41 return month; 42 } 43 44 public double getSalary(int month) { 45 return 0; 46 } 47 } 48 49 50 package test; 51 52 public class HourlyEmployee extends ColaEmployee { 53 protected int hourmoney; 54 protected int daymonth; 55 56 public HourlyEmployee() { 57 super(); 58 } 59 60 public HourlyEmployee(String name, int month, int hourmoney, int daymonth) { 61 super(name, month); 62 this.hourmoney = hourmoney; 63 this.daymonth = daymonth; 64 } 65 66 public double getSalary(int month) { 67 if (super.month == month) { 68 if (daymonth > 160) { 69 return hourmoney * 160 + hourmoney * (daymonth - 160) * 1.5 70 + 100; 71 } else { 72 return hourmoney * daymonth + 100; 73 } 74 } else { 75 if (daymonth > 160) { 76 return hourmoney * 160 + hourmoney * (daymonth - 160) * 1.5; 77 } else { 78 return hourmoney * daymonth; 79 } 80 } 81 } 82 83 } 84 85 86 package test; 87 88 public class SalariedEmployee extends ColaEmployee { 89 protected double money; 90 91 public SalariedEmployee() { 92 super(); 93 } 94 95 public SalariedEmployee(String name, int month, double money) { 96 super(name, month); 97 this.money = money; 98 } 99 100 public double getSalary(int month) { 101 if (super.month == month) { 102 return money + 100; 103 } else { 104 return money; 105 } 106 } 107 108 } 109 110 111 package test; 112 113 public class SalesEmployee extends ColaEmployee { 114 protected int monthsales; 115 protected double rate; 116 117 public SalesEmployee() { 118 super(); 119 } 120 121 public SalesEmployee(String name, int month, int monthsales, double rate) { 122 super(name, month); 123 this.monthsales = monthsales; 124 this.rate = rate; 125 } 126 127 public double getSalary(int month) { 128 if (super.month == month) { 129 return monthsales * rate + 100; 130 } else { 131 return monthsales * rate; 132 } 133 } 134 135 } 136 137 138 package test; 139 140 public class Company { 141 public void getSalary(ColaEmployee c, int month) { 142 System.out.println(c.name + "在" + month + "月的月薪为" + c.getSalary(month) ); 143 } 144 } 145 146 147 package test; 148 149 public class Test { 150 151 public static void main(String[] args) { 152 // TODO Auto-generated method stub 153 ColaEmployee c[] = { new SalariedEmployee("salar", 3, 15000), new HourlyEmployee("hourly", 5, 20, 200), 154 new SalesEmployee("sales", 8, 10000, 0.6) }; 155 for (int i = 0; i < c.length; i++) { 156 new Company().getSalary(c[i], 6); 157 158 } 159 } 160 }

Java第十次作业
发布时间 2023-06-09 19:23:19作者: coldlane