六大设计原则之迪米特法则

//总公司员工
class Employee{
    private String id;   
    public void setId(String id){  
        this.id = id;  
    }  
    public String getId(){  
        return id;  
    } 
}

//分公司员工
class SubEmployee{  
    private String id;  
    public void setId(String id){  
        this.id = id;  
    }  
    public String getId(){  
        return id;  
    }  
}  

class SubCompanyManager{  
    public List<SubEmployee> getAllEmployee(){  
        List<SubEmployee> list = new ArrayList<SubEmployee>();  
        for(int i=0; i<100; i++){  
            SubEmployee emp = new SubEmployee();  
            //为分公司人员按顺序分配一个ID  
            emp.setId("分公司"+i);  
            list.add(emp);  
        }  
        return list;  
    }  
class CompanyManager{  
    public List<Employee> getAllEmployee(){  
        List<Employee> list = new ArrayList<Employee>();  
        for(int i=0; i<30; i++){  
            Employee emp = new Employee();  
            //为总公司人员按顺序分配一个ID  
            emp.setId("总公司"+i);  
            list.add(emp);  
        }  
        return list;  
    }  
      
    public void printAllEmployee(SubCompanyManager sub){  
        List<SubEmployee> list1 = sub.getAllEmployee();  
        for(SubEmployee e:list1){  
            System.out.println(e.getId());  
        }  
  
        List<Employee> list2 = this.getAllEmployee();  
        for(Employee e:list2){  
            System.out.println(e.getId());  
        }  
    }  
}  
}  

public class Client{  
    public static void main(String[] args){  
        CompanyManager e = new CompanyManager();  
        e.printAllEmployee(new SubCompanyManager());  
    }  
}