求解！！！！！

import java.util.*;
public class Mapshiyan24 {
public static void main(String args[]){
     Map employers=new LinkedHashMap(10,0.75f,true);
     employers.put("1111-01",new Employer("zhang",26,"male","manager",3000f));
     employers.put("1111-02",new Employer("li",25,"male","leader",2000f));
     employers.put("1111-03",new Employer("wang",24,"male","employer",1000f));
     employers.put("1111-04",new Employer("zhao",24,"famale","employer",1000f));
     
     Set set =employers.entrySet();
     Iterator iterator=set.iterator();
     for(int i=0;i<employers.size();i++){
      if(iterator.hasNext()){
      Map.Entry me=(Map.Entry)iterator.next();
      Employer employer=(Employer)me.getValue();
      System.out.println("The information of employer["+i+"]:");
      System.out.println("Key in map is: "+me.getKey());
      System.out.println("Name:"+employer.getName());
      System.out.println("Age:"+employer.getAge());
      System.out.println("Sex:"+employer.getSex());
      System.out.println("Post:"+employer.getPost());
      System.out.println("Salary: "+employer.getSalary());
      System.out.println();
      
      }
      
     }
     Employer a=(Employer)employers.get("1111-04");
     System.out.println(a.getName());
 System.out.println("Name:"+a.getName());
 System.out.println("Age:"+a.getAge());
 System.out.println("Sex:"+a.getSex());
 System.out.println("Post:"+a.getPost());
 System.out.println("Salary: "+a.getSalary());
 System.out.println();
}
}class Employer{
private String name;
private int age;
private String sex;
private String post;
private float salary;
public Employer(){}
public Employer(String name,int age,String sex,String post,float salary)
{
this.name=name;
this.age=age;
this.sex=sex;
this.post=post;
this.salary=salary;

}
public String getName(){return name;}
public void setName(String str){this.name=str;}
public int getAge(){return age;}
public void setAge(int age){this.age=age;}
public String getSex(){return sex;}
public void setSex(String sex){this.sex=sex;}
public String getPost(){return post;}
public void setPost(String post){this.post=post;}
public float getSalary(){return salary;}
public void setSalary(float salary){this.salary=salary;}

}它说  class Employer 已定义了。  是哪里错了？？？？  求各位大神求解