JAVA继承、多态练习

package PersonSalary;

abstract class Person {
private int ID;
private String name;
private double salary;
int holidays;
public Person(){

}
public Person(int ID,String name,double salary,int holidays){
this.ID = ID;
this.name = name;
this.salary = salary;
this.holidays = holidays;
}
public double CalculateSalary(){
if(holidays==0)
return salary;
else if(holidays>0&&holidays<5)
return salary*0.75;
else
return salary*0.5;
}
}

package PersonSalary;

public class Employee extends Person {
public Employee(){
super();
}
public Employee(int ID,String name,double salary,int holidays){
super(ID,name,salary,holidays);
}
public double CalculateSalary(){
return super.CalculateSalary()+super.CalculateSalary()*0.1
+super.CalculateSalary()*0.3;
}
}

package PersonSalary;

public class Manager extends Person {
public Manager(){
super();
}
public Manager(int ID,String name,double salary,int holidays){
super(ID,name,salary,holidays);
}
public double CalculateSalary(){
return super.CalculateSalary()+super.CalculateSalary()*0.2+
super.CalculateSalary()*0.5+500;
}
}

package PersonSalary;

public class Director extends Person
{
public Director(){
super();
}
public Director(int ID,String name,double salary,int holidays){
super(ID,name,salary,holidays);
}
public double CalculateSalary(){
return super.CalculateSalary()+super.CalculateSalary()*0.2
+super.CalculateSalary()*0.5+500;
}
}

package PersonSalary;

import java.util.*;

public class Test {
public static void main(String[] args) {
Scanner reader = new Scanner(System.in);
System.out.println("请输入ID：");
int ID = reader.nextInt();
System.out.println("请输入姓名：");
String name = reader.next();
System.out.println("请输入工资：");
double salary = reader.nextDouble();
System.out.println("请输入请假天数：");
int holidays = reader.nextInt();
System.out.println("请选择职业：");
System.out.println("1.普通员工    2.经理    3.董事");
int choose = reader.nextInt();
if(choose==1){
Employee TCL = new Employee(ID,name,salary,holidays);
System.out.println(name+"的工资为："+TCL.CalculateSalary());
}else if(choose==2){
Manager TCL = new Manager(ID,name,salary,holidays);
System.out.println(name+"的工资为："+TCL.CalculateSalary());
}else{
Director TCL = new Director(ID,name,salary,holidays);
System.out.println(name+"的工资为："+TCL.CalculateSalary());
}
}
}