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Question

All class are supported with default constructor, proper constructor, set, get and toString method.
1. create a class “Employee” having id ,name ,gender, and job.
2. create a subclass “Worker” having hours worked, wages per hour. Write getSalary method to salary.
3. create a subclass “SalesMan” having sales and commission percent . Write getCommission method to calculate salary.
4. create a client class “Roll” to have any employee by identifying using menu to print salary details. 
        Input can be random , but collect Worker and SalesMan details separately.
1. 建立一个class “Employee” 包括 id , name ,gender，job,
2. 建立一个class “Worker” 包括 hours (工作时间), wages（每小时工资）
3. 建立一个class “ SalesMan”  包括　sales(销售额)，commission percent（佣金百分率）
4. 建立一个class “ Roll”  连接以上class , 然后能输出详细信息

Answer 1

class Employee{
  id,name...
  setXxxx(){}
  getXxxx(){}
  ...
}
class Worker extends Employee{
  Worker(xxxx){
    super(xxxx);
    hours=
    wages=
  }
  hours,wages;
  setXxxx()
  getXxxx()
}
class SalesMan extends Worker{
  Sales,commissionPercent;
  SalesMan(xxxx){
    super(xxxx);
    sales=
    commissionPercent=
  }
  setXxxxx getXxxxx
}
class Roll{
   Roll(Employee){
   xxx
   }
   ...
   toString(){
   ...
   }
}

Answer 2

在每个类里都加个toString方法 子类可以super.toString()+xxx+xxxx

Answer 3

最后一个Roll 能详细点麽 

Answer 4

哈哈 发现我也不知道roll如何连接以上class 英文我看不懂 我简单写了个roll  但是感觉完全多此一举
打印格式 你按自己喜欢的方式改吧public class EmployeeTest {
public static void main(String[] args){
Employee e=new Employee("123","Sun","man","");
Worker w1=new Worker(e,25,10.0);
Worker w2=new Worker(w1);
w2.setId("abc");w2.setName("moon");w2.setWages(20.0);
SalesMan s1=new SalesMan(e);
SalesMan s2=new SalesMan(w2);
s2.setCommissionPercent(0.1);
Roll roll1=new Roll(e);
Roll roll2=new Roll(w1);
Roll roll3=new Roll(w2);
Roll roll4=new Roll(s1);
Roll roll5=new Roll(s2);
roll1.print();
roll2.print();
roll3.print();
roll4.print();
roll5.print();
}
}
class Employee{
private String id,name,gender,job;
public Employee(){
id="";name="";gender="";job="";
}
public Employee(String id,String name,String gender,String job){
this.id=id; this.name=name; 
this.gender=gender; this.job=job;
}
public Employee(Employee e){
this.id=e.id;this.name=e.name;
this.gender=e.gender;this.job=e.job;
}
public void setId(String id){
this.id=id;
}
public String getId(){
return id;
}
public void setName(String name){
this.name=name;
}
public String getName(){
return name;
}
public void setGender(String gender){
this.gender=gender;
}
public String getGender(){
return gender;
}
public void setJob(String job){
this.job=job;
}
public String getJob(){
return job;
}
public String toString(){
return "[ID:"+id+"; Name:"+name+"; Gender:"+gender+"; job:"+job+"]";
}
} class Worker extends Employee{ 
private int hours;
private double wages;
public Worker(){
super();
hours=0;
wages=0.0;
}
public Worker(Employee e){
super(e);
hours=0;
wages=0.0;
}
public Worker(Employee e,int hours,double wages){
super(e);
this.hours=hours;
this.wages=wages;
}
public Worker(Worker worker){
super(worker);
hours=worker.hours;
wages=worker.wages;
}
public void setHours(int hours){
this.hours=hours;
}
public int getHours(){
return hours;
}
public void setWages(double wages){
this.wages=wages;
}
public double getWages(){
return wages;
}
public String toString(){
return super.toString()+"\n[hours:"+hours+"; wages:"+wages+"]";
}
} class SalesMan extends Worker{ 
private double sales;
private double commissionPercent; 
public SalesMan(){
    super(); 
    sales=0.0; 
    commissionPercent=0.0; 
 } 
public SalesMan(Employee e){
super(e);
sales=0.0; 
commissionPercent=0.0; 
}
public SalesMan(Worker w){
super(w);
sales=0.0; 
commissionPercent=0.0; 
}
public SalesMan(Employee e,double sales,double commissionPercent){
super(e);
this.sales=sales;
this.commissionPercent=commissionPercent;
}
public SalesMan(SalesMan salesMan){
super(salesMan);
sales=salesMan.sales;
commissionPercent=salesMan.commissionPercent;
}
public void setSales(double sales){
this.sales=sales;
}
public void setCommissionPercent(double commissionPercent){
this.commissionPercent=commissionPercent;
}
public double getSales(){
return sales; 
}
public double getCommissionPercent(){
return commissionPercent;
}
public String toString(){
 return super.toString()+"\n[Sales:"+sales+"; Commission Percent:"+commissionPercent+"]";
}
} 
class Roll{
private Employee employee;
Roll(Employee e){ 
employee=e; 
} 
public void print(){
System.out.println(employee);
}
}