练习3 编写工资系统,实现不同类型员工(多态)的按月发放工资。如果当月出现某个 Employee对象的生日,则将该雇员的工资增加100元。 实验说明: (1)定义一个Employee类,该类包含: private成员变量name,number,birthday,其中birthday 为MyDate类的对象; abstract方法earnings(); toString()方法输出对象的name,number和birthday。 (2)MyDate类包含: private成员变量year,month,day ; toDateString()方法返回日期对应的字符串:xxxx年xx月xx日 (3)定义SalariedEmployee类继承Employee类,实现按月计算工资的员工处 理。该类包括:private成员变量monthlySalary; 实现父类的抽象方法earnings(),该方法返回monthlySalary值;toString()方法输 出员工类型信息及员工的name,number,birthday。 练习3 (4)参照SalariedEmployee类定义HourlyEmployee类,实现按小时计算工资的 员工处理。该类包括: private成员变量wage和hour; 实现父类的抽象方法earnings(),该方法返回wage*hour值; toString()方法输出员工类型信息及员工的name,number,birthday。 (5)定义PayrollSystem类,创建Employee变量数组并初始化,该数组存放各 类雇员对象的引用。利用循环结构遍历数组元素,输出各个对象的类 型,name,number,birthday,以及该对象生日。当键盘输入本月月份值时,如果本 月是某个Employee对象的生日,还要输出增加工资信息。 提示: //定义People类型的数组People c1[]=new People[10]; //数组元素赋值 c1[0]=new People("John","0001",20); c1[1]=new People("Bob","0002",19); //若People有两个子类Student和Officer,则数组元素赋值时,可以使父类类型的数组元素指向子类。 c1[0]=new Student("John","0001",20,85.0); c1[1]=new Officer("Bob","0002",19,90.5)
abstract public class Employee {
private String name;
private int number;
private MyDate birthday= new MyDate();
public abstract int earnings();//抽象方法
public String toString(){
return "姓名:"+name+" 编号:"+number+" 生日:"+birthday.toDateString();
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
public MyDate getBirthday() {
return birthday;
}
public void setBirthday(MyDate birthday) {
this.birthday = birthday;
}
}
public class MyDate {
private int year;
private int month;
private int day;
public MyDate(int year,int month,int day){
this.year=year;
this.month=month;
this.day=day;
}
public MyDate(){
}
public int getMonth() {
return month;
}
public String toDateString() {
if(month<0||month>12){
System.out.println("输入错误");
}
if(month==1){
if(day>31||day<0){
System.out.println("输入错误");
}
}
if(month==2&&year%400==0){
if(day>29||day<0){
System.out.println("输入错误");
}
}
if(month==2&&year%400!=0){
if(day>28||day<0){
System.out.println("输入错误");
}
}
if(month==3){
if(day>31||day<0){
System.out.println("输入错误");
}
}
if(month==4){
if(day>30||day<0){
System.out.println("输入错误");
}
}
if(month==5){
if(day>31||day<0){
System.out.println("输入错误");
}
}
if(month==6){
if(day>30||day<0){
System.out.println("输入错误");
}
}
if(month==7){
if(day>31||day<0){
System.out.println("输入错误");
}
}
if(month==8){
if(day>31||day<0){
System.out.println("输入错误");
}
}
if(month==9){
if(day>30||day<0){
System.out.println("输入错误");
}
}
if(month==10){
if(day>31||day<0){
System.out.println("输入错误");
}
}
if(month==11){
if(day>30||day<0){
System.out.println("输入错误");
}
}
if(month==12){
if(day>31||day<0){
System.out.println("输入错误");
}
}
return year + "年" + month + "月" + day + "日";
}
}
public class SalariedEmployee extends Employee {
private int monthlySalary;
public SalariedEmployee(String name,int number,MyDate m,int monthlySalary){
setName(name);
setNumber(number);
setBirthday(m);
this.monthlySalary=monthlySalary;
}
public int earnings(){
return monthlySalary;
}
}
public class HourlyEmployee extends Employee {
private int hour;
private int wage;
public HourlyEmployee(String name,int number,MyDate m,int hour,int wage){
setName(name);
setNumber(number);
setBirthday(m);
this.hour=hour;
this.wage=wage;
}
public int earnings(){
return hour*wage;
}
}
import java.util.Scanner;
public class PayrollSystem {
Employee[] arr = new Employee[10];
Scanner scan=new Scanner(System.in);
int total=0;
public void addArr(Employee e){//(懒得写)
arr[total++]=e;
}
public void getArr() {//获取数据方法(暂定)
int inputMonth=0;
boolean flag=true;
while(flag) {
System.out.println("请输入当前月份: ");
inputMonth = scan.nextInt();
if (inputMonth > 12 || inputMonth < 0) {
System.out.println("输入错误,请重新输入");
}
else{
flag=false;
}
}
for (int i = 0; i < total; i++){
System.out.println(arr[i]);
if(arr[i].getBirthday().getMonth()==inputMonth){
int wages = arr[i].earnings()+100;
System.out.print("本月工资是:"+wages+",今天是你生日,公司给你100元去买房吧年轻人!\n");
}
}
}
}
public class test111 {
public static void main(String[]args){
PayrollSystem p1=new PayrollSystem();
p1.addArr(new SalariedEmployee("zx",1,new MyDate(2001,12,29),2000));
p1.addArr(new HourlyEmployee("rr",2,new MyDate(2001,3,7),240,17));
p1.addArr(new HourlyEmployee("ww",3,new MyDate(2001,6,12),240,17));
p1.getArr();
}
}