606 薪資計算

第一題

abstract class Teacher{
String name;
int rate;
int totalHours;
Teacher(){}
Teacher(String n,int r,int t){
name=n;
rate=r;
totalHours=t;
}
abstract double salary();

}

class FullTimeTeacher extends Teacher{
FullTimeTeacher(){}
FullTimeTeacher(String n,int r,int t){
super(n,r,t);
}
double salary(){
return rate*9+((totalHours-9)*rate*0.8);
}
}

class PartTimeTeacher extends Teacher{
PartTimeTeacher(){}
PartTimeTeacher(String n,int r,int t){
super(n,r,t);
}
double salary(){
return rate*totalHours;
}
}

public class JPA06_1 {
    public static void main(String argv[]) {
        PartTimeTeacher p1 = new PartTimeTeacher("John",400,2);
        PartTimeTeacher p2 = new PartTimeTeacher("Mary",300,4);
        FullTimeTeacher f1 = new FullTimeTeacher("Peter",400,9);
        FullTimeTeacher f2 = new FullTimeTeacher("Paul",300,12);
        FullTimeTeacher f3 = new FullTimeTeacher("Eric",350,15);
        System.out.println("John-PartTime" + p1.salary());
        System.out.println("Mary-PartTime" + p2.salary());
        System.out.println("Peter-FulLTime" + f1.salary());
        System.out.println("Paul-FulLTime" + f2.salary());
        System.out.println("Eric-FulLTime" + f3.salary());
    }
}

第二題

abstract class Teacher{
String name;
int rate;
int totalHours;
Teacher(){}
Teacher(String n,int r,int t){
name=n;
rate=r;
totalHours=t;
}
abstract double salary();
double afterTaxIns(){
return salary()*0.9-100;
}
}
class Manager extends FullTimeTeacher{
int rank;
Manager(){}
Manager(String n,int r,int t,int k){
super(n,r,t);
rank=k;
}
double salary(){
return super.salary()+rank*500;
}
double getTotalSalary(){
return salary();
}
}

public class JPA06_2 {
    public static void main(String argv[]) {
        PartTimeTeacher p1 = new PartTimeTeacher("John",400,2);
        PartTimeTeacher p2 = new PartTimeTeacher("Mary",300,4);
        FullTimeTeacher f1 = new FullTimeTeacher("Peter",400,9);
        FullTimeTeacher f2 = new FullTimeTeacher("Paul",300,12);
        FullTimeTeacher f3 = new FullTimeTeacher("Eric",350,15);

        System.out.println("John-afterTaxIns：" + p1.afterTaxIns());
        System.out.println("Mary-afterTaxIns：" + p2.afterTaxIns());
        System.out.println("Peter-afterTaxIns：" + f1.afterTaxIns());
        System.out.println("Paul-afterTaxIns：" + f2.afterTaxIns());
        System.out.println("Eric-afterTaxIns：" + f3.afterTaxIns());

        Manager am1 = new Manager("Fang", 500, 12, 3);
        System.out.println("Fang-Manager：" + am1.getTotalSalary());
        System.out.println("Fang-afterTaxIns：" + am1.afterTaxIns());


    }
}

第三題

abstract class Teacher{
String name;
int rate;
int totalHours;
Teacher(){}
Teacher(String n,int r,int t){
name=n;
rate=r;
totalHours=t;
}
abstract double salary();
double afterTaxIns(){
return salary()*0.9-100;
}
void compare(Teacher t){
if(salary()>t.salary()){
System.out.println(name+" is higher than "+t.name);
}
else{
System.out.println(t.name+" is higher than "+name);
}
}
}
public class JPA06_3 {
    public static void main(String argv[]) {
        PartTimeTeacher p1 = new PartTimeTeacher("John",400,2);
        PartTimeTeacher p2 = new PartTimeTeacher("Mary",300,4);
        FullTimeTeacher f1 = new FullTimeTeacher("Peter",400,9);
        FullTimeTeacher f2 = new FullTimeTeacher("Paul",300,12);
        FullTimeTeacher f3 = new FullTimeTeacher("Eric",350,15);

        Manager am1 = new Manager("Fang", 500, 12, 3);


        am1.compare(f3);
        p1.compare(f3);
    }
}

第四題

import java.util.*;
class TeacherDB{
HashMap<String,Teacher> MultiFund;
TeacherDB(){
MultiFund = new HashMap<String,Teacher>();
}
void store(String s,Teacher t){
MultiFund.put(s,t);
}
double totalOfAll(){
double sum=0;
for(String key:MultiFund.keySet()){
sum+=MultiFund.get(key).afterTaxIns();
}
return sum;
}
}

public class JPA06_4 {
    public static void main(String argv[]) {
        PartTimeTeacher p1 = new PartTimeTeacher("John",400,2);
        PartTimeTeacher p2 = new PartTimeTeacher("Mary",300,4);
        FullTimeTeacher f1 = new FullTimeTeacher("Peter",400,9);
        FullTimeTeacher f2 = new FullTimeTeacher("Paul",300,12);
        FullTimeTeacher f3 = new FullTimeTeacher("Eric",350,15);
        Manager am1 = new Manager("Fang", 500, 12, 3);

        TeacherDB school = new TeacherDB();
        school.store("John", p1);
        school.store("Mary", p2);
        school.store("Peter", f1);
        school.store("Paul", f2);
        school.store("Eric", f3);
        school.store("Fang", am1);
        System.out.println("Total salary: " + school.totalOfAll());
    }
}

第五題

import java.util.*;
class TeacherDB{
HashMap<String,Teacher> MultiFund;
TeacherDB(){
MultiFund = new HashMap<String,Teacher>();
}
void store(String s,Teacher t){
MultiFund.put(s,t);
}
double totalOfAll(){
double sum=0;
for(String key:MultiFund.keySet()){
sum+=MultiFund.get(key).afterTaxIns();
}
return sum;
}
void printAllTeacher(){
for(String key:MultiFund.keySet())
{
try{
if(key.equals("Fang")){
continue;
}
if(MultiFund.get(key).salary()<1500){

throw new Exception("**"+key+"__Salary__"+MultiFund.get(key).salary());
}

System.out.println(key+"__Salary__"+MultiFund.get(key).salary());

}

catch(Exception s)
{
System.out.println(s.getMessage());
}

}
}
}