麻烦各位java程序大神，帮助我一下，给我下面一道java题的代码呗？我是真不会。

Question

按以下要求完成类的设计与对象创建：

（1）定义一个职工类（Employee），定义2个属性并对其封装，属性包括职工编号(identifier)、职工姓名(name)；定义一个2个参数的构造方法，用于对职工编号、职工姓名两个属性的初始化；定义一个成员方法work()，用于描述员工工作情况（如：输出“工作时间：周一至周五，朝九晚五”）；定义一个成员方法showInfo()用于输出职工基本信息。

（2）通过继承Employee类定义一个经理类（Manager），定义一个属性工作部门(department)，并封装；改写父类的showInfo()方法，在输出职工编号、职工姓名的基础上，输出工作部门；

（3）通过继承Employee类定义一个董事长类（Chairman），改写父类的work方法，使其输出“董事长主持召开股东大会”。

（4）编写测试类（类名以姓名拼音加作业序号命名），在测试类中分别创建3个类的对象，对所有属性进行初始化或赋值，分别调用自身定义的方法和从父类继承来来的方法。

Answer 1

/**
* 职工类
*/
public class Employee {

private String identifier;//职工编号
private String name;//职工姓名

public Employee() {
}

public Employee(String identifier, String name) {
this.identifier = identifier;
this.name = name;
}

public String getIdentifier() {
return identifier;
}

public void setIdentifier(String identifier) {
this.identifier = identifier;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public void work() {
System.out.println("工作时间：周一至周五，朝九晚五");
}

public void showInfo() {
System.out.println("编号："+getIdentifier()+",姓名："+getName());
}
}

/**
* 经理类
*/
public class Manager extends Employee{

private String department;//工作部门

public Manager(String identifier, String name) {
super(identifier, name);
}

public String getDepartment() {
return department;
}

public void setDepartment(String department) {
this.department = department;
}

@Override
public void showInfo() {
System.out.println("编号："+getIdentifier()+",姓名："+getName()+"，负责的工作部门："+getDepartment());
}
}

/**
* 董事长类
*/
public class Chairman extends Employee{

@Override
public void work() {
System.out.println("董事长主持召开股东大会");
}
}

/**
* 测试类：类名DemoTest03
*/
public class DemoTest03 {

public static void main(String[] args) {
Employee e = new Employee("07","益达");
Manager m = new Manager("01","小黑");
m.setDepartment("爱情公寓");
Chairman c = new Chairman();
e.showInfo();
e.work();
m.showInfo();
c.work();
}
}

Answer 2

public class Demo {
public static void main(String[] args) {
Employee employee = new Employee("003", "张三");
Manager manager = new Manager("002", "李四", "财务部");
Chairman chairman = new Chairman("001", "王麻子");

employee.showInfo();
employee.work();

manager.showInfo();
manager.work();

chairman.showInfo();
chairman.work();
}
}

class Employee {
private String identifier;
private String name;

public Employee(String identifier, String name) {
this.identifier = identifier;
this.name = name;
}

public void work() {
System.out.println("工作时间：周一至周五，朝九晚五");
}

public void showInfo() {
System.out.println("职工编号" + this.identifier + ", 职工姓名: " + this.name);
}

public String getIdentifier() {
return identifier;
}

public void setIdentifier(String identifier) {
this.identifier = identifier;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}

class Manager extends Employee {
private String department;

public Manager(String identifier, String name, String department) {
super(identifier, name);
this.department = department;
}

@Override
public void showInfo() {
System.out.println("职工编号" + this.getIdentifier() + ", 职工姓名: " + this.getName() + ", 工作部门: " + this.department);
}

public String getDepartment() {
return department;
}
}

class Chairman extends Employee {

public Chairman(String identifier, String name) {
super(identifier, name);
}

@Override
public void work() {
System.out.println("董事长主持召开股东大会");
}
}