2、Cola公司的雇员分为以下若干类:(知识点:多态)
(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。
(2) SalariedEmployee : ColaEmployee 的子类,拿固定工资的员工。
属性:月薪
(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) 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
(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。
private String name;
private int months;
private int birthday;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getMonths() {
return months;
}
public void setMonths(int months) {
this.months = months;
}
public int getBirthday() {
return birthday;
}
public void setBirthday(int birthday) {
this.birthday = birthday;
}
public ColaEmployee(String name, int months,int birthday) {
super();
this.name = name;
this.months = months;
this.birthday = birthday;
}
void getSalary() {
}
private double mone;
public SalariedEmployee(String name, int months, int birthday,double money) {
super(name, months, birthday);
if(super.getMonths()==super.getBirthday()) {
System.out.println("员工"+name+months+"月的工资为"+(money+100));
}else {
System.out.println("员工"+name+months+"月的工资为"+money);
}
}
private double hours;
private int mon;
public HourlyEmployee(String name, int months, int birthday,double hours,int mon) {
super(name, months, birthday);
this.hours=hours;
this.mon=mon;
if(super.getBirthday()!=super.getMonths()&&super.getMonths()>=160) {
System.out.println("员工"+name+months+"月的工资为"+(mon*160+(hours-160)*mon*1.5));
}else if(super.getBirthday()==super.getMonths()&&super.getMonths()>=160){
System.out.println("员工"+name+months+"月的工资为"+(mon*160+(hours-160)*mon*1.5+100));
}else if(super.getBirthday()==super.getMonths()&&super.getMonths()<160) {
System.out.println("员工"+name+months+"月的工资为"+(mon*hours+100));
}else if(super.getBirthday()!=super.getMonths()&&super.getMonths()<160) {
System.out.println("员工"+name+months+"月的工资为"+mon*hours);
}
}
private double x;
private double L;
public SalesEmployee(String name, int months, int birthday,double x,double L) {
super(name, months, birthday);
if(super.getMonths()==super.getBirthday()) {
System.out.println("员工"+super.getName()+"工资为"+x*L+100);
}else{
System.out.println("员工"+super.getName()+"工资为"+x*L);
}
}
ColaEmployee[]y=new ColaEmployee[6];
y[0]=new SalariedEmployee("tofm", 2, 2, 2000);
y[1]=new HourlyEmployee("tom", 4, 4, 170, 13);
y[2]=new SalariedEmployee("to", 6, 6, 2000);
y[3]=new SalariedEmployee("tm", 3, 3, 2000);
y[4]=new SalesEmployee("tosm", 7, 7, 20000, 0.13);
y[5]=new SalesEmployee("tmu",8, 8, 20000, 0.13);
3、利用接口实现动态的创建对象:(知识点:接口 )
(1)创建4个类
1苹果
2香蕉
3葡萄
4园丁
(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”);
}
}
pa ckage javademo9;
import java.util.Scanner;
interface Fruit{
}
class Apple implements Fruit {
public Apple() {
System.out.println("创建了一个苹果对象");
}
}
class Pear implements Fruit {
public Pear() {
System.out.println("创建了一个梨对象");
}
}
class Orange implements Fruit {
public Orange() {
System.out.println("创建了一个桔子对象");
}
}
//接口作为方法返回值的意义:返回实现了该接口的对象
class Gardener{
public Fruit create() {
Scanner input = new Scanner(System.in);
String name = input.next();
Fruit fruit = null;
switch(name){
case "苹果":
fruit = new Apple();
break;
case "梨":
fruit = new Pear();
break;
case "桔子":
fruit = new Orange();
break;
}
input.close();
return fruit;
}
}
public class Test1 {
public static void main(String[] args) {
Gardener g = new Gardener();
g.create();
}
}
12:04:27
package zy;
import java.util.Scanner;
//1、编写应用程序,从命令行传入两个整型数作为除数和被除数。
//要求程序中捕获NumberFormatException 异常和ArithmeticException 异常,而且无论在哪种情况下,
//“总是被执行”这句话都会在控制台输出。 [必作题]
public class Yc {
public static void main(String[] args) {
try { Scanner input=new Scanner(System.in);
System.out.println("输入两个整数");
int a=input.nextInt();
int b=input.nextInt();
System.out.println(a+""+b);
}catch(NumberFormatException e) {
System.out.println("数字结构异常");
}catch(ArithmeticException e) {
System.out.println("算术异常");
}catch(Exception e) {
System.out.println("异常");
}finally{
System.out.println("总是被执行");
}
}
}
(4)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。
运行结果如图:
//1、利用接口实现动态的创建对象[选做题]
//1.1 创建4个类:
//苹果
//香蕉
//葡萄
//园丁
//1.2 在三种水果的构造方法中打印一句话.
//以苹果类为例
//类图如右:
//1.3 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,如图:
public interface Fruit {
void created();
}
public class Apple implements Fruit {
@Override
public void created() {
System.out.println("创建了一个苹果对象");
}
}
public class Oranges implements Fruit {
@Override
public void created() {
System.out.println("创建了一个橘子");
}
}
public class Pear implements Fruit {
public void created() {
System.out.println("创建了一个梨");
}
}
public class Gardener {
void creat(Fruit fruit) {
fruit.created();
}
}
public class Fruitrun {
public static void main(String[] args) {
Gardener gardener=new Gardener();
System.out.println("输入一个水果");
Scanner input=new Scanner(System.in);
String fruit=input.nextLine();
switch(fruit) {
case "苹果":Apple apple=new Apple();
gardener.creat(apple);break;
case "橘子":Oranges oranges=new Oranges();
gardener.creat(oranges);break;
case "梨":Pear pear=new Pear();
gardener.creat(pear);break;
default:System.out.println("没有该水果");
}}
~~~