两道JAVA程序设计题

第一题看的脑壳疼，但是和第二题的意思差不多，我帮你做了第二题

public class List {

public static void main(String[] args) {

Employee e1 = new Employee("张强","2010/09/01",6890)

e1.show("普通")

System.out.println("年纳税："+e1.tax())

Manager m1 = new Manager("朱慧","2003/07/06",18530,38000)

m1.show("管理")

System.out.println("年纳税："+m1.tax())

}

}

//下面是补全的代码

class Employee{

String name,date

double salary,bonus

Employee(String name,String date,double salary){

this.name = name

this.date = date

this.salary = salary

}

public void show(String str){

System.out.println("岗位:"+str)

System.out.println("姓名:"+name+",入职时间:"+date+",月薪:"+salary)

}

public double tax(){

if(salary <= 0){

throw new RuntimeException("工资不允许小于等于0")

}

else if(salary>3000 && salary<=5000){

salary = salary*0.05*12 //纳税这里我也不知道他们具体是怎么个算法，反正意思差不多，套进去就行了

}

else if(salary>5000 && salary<=10000){

salary = salary*0.1*12

}

else if(salary>10000 && salary<=15000){

salary = salary*0.15*12

}

else if(salary>15000){

salary = salary*0.2*12

}

return salary+(bonus*0.2)

}

}

class Manager extends Employee{

Manager(String name,String date,double salary,double bonus){

super(name,date,salary)

super.bonus = bonus

}

public void show(String str){

System.out.println("岗位:"+str)

System.out.println("姓名:"+name+",入职时间:"+date+",月薪:"+salary+",奖金:"+bonus)

}

}

class Car extends Vehicle{

super(speed,kind,color)

private int passenger

public void Car(int speed,String kind,String color,int passenger){

this.speed=speed

this.kind=kind

this.color=color

this.passenger=passenger

}

public void setCar(int speed,String kind,String color){

this.speed=speed

this.kind=kind

this.color=color

}

public void setPassenger(int passenger){

this.passenger=passenger

}

public int getSpeed(){

return speed

}

public String getKind(){

return kind

}

public String getColor(){

return color

}

public int getPassenger(){

return passenger

}

public String toString(){

return "速度:"+speed+"类型:"+kind+"颜色:"+color+"人数"+passenger

}

}

public class test{

public static void main(String[] args){

Vehicle c=new Car()

c.setCar(100,"小车","red")

c.setPassenger(5)

System.out.println(c.toString())

}

}

打了半天.不知道有没有错..你调调看吧.呵呵..都不太记得了.

//人接口

public interface Human {

void speak()

}

//教师类

public class Teacher implements Human {

public void speak() {

System.out.println("speak")

}

public void teach() {

System.out.println("teach")

}

}

//学生类

public class Student implements Human {

public void speak() {

System.out.println("speak")

}

public void learn() {

System.out.println("learn")

}

}

//测试类

class HumanTest {

@Test

void test() {

Teacher teacher=new Teacher()

Student stu=new Student()

teacher.teach()

teacher.speak()

stu.learn()

stu.speak()

}

}

运行结果：

teach

speak

learn

speak

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