employee.java

这个是java设计模式的文件 可能对了解设计思想有一定帮助

import java.util.*;

public class Employee
{
   String name;
   float salary;
   Vector subordinates;
   boolean isLeaf;
   Employee parent = null;
//--------------------------------------
   public Employee(String _name, float _salary)
   {
      name = _name;
      salary = _salary;
      subordinates = new Vector();
      isLeaf = false;
   }
   //--------------------------------------
   public Employee(Employee _parent, String _name, float _salary)
   {
      name = _name;
      salary = _salary;
      parent = _parent;
      subordinates = new Vector();
      isLeaf = false;
   }
   //--------------------------------------
   public void setLeaf(boolean b)
   {
      isLeaf = b;    //if true, do not allow children
   }
   //--------------------------------------
   public float getSalary()
   {
      return salary;
   }
   //--------------------------------------
   public String getName()
   {
      return name;
   }
   //--------------------------------------
   public boolean add(Employee e)
   {
      if (! isLeaf) 
         subordinates.addElement(e);   
      return isLeaf;    //false if unsuccessful
   }
   //--------------------------------------
   public void remove(Employee e)
   {
      if (! isLeaf)
         subordinates.removeElement(e);
   }
   //--------------------------------------
   public Enumeration elements()
   {
      return subordinates.elements();
   }
   //--------------------------------------
   public Employee getChild(String s)
     {
        Employee newEmp = null;

        if(getName().equals(s))
           return this;
        else
        {
           boolean found = false;
           Enumeration e = elements();
           while(e.hasMoreElements() && (! found))
           {  
              newEmp = (Employee)e.nextElement();
              found = newEmp.getName().equals(s);
              if (! found)
                 {
                 newEmp = newEmp.getChild(s);
                 found =(newEmp != null);
                 }
           }
           if (found) 
              return newEmp;
           else
              return null;
        }
     }

   //--------------------------------------
   public float getSalaries()
   {
      float sum = salary;
      for(int i = 0; i < subordinates.size(); i++)
      {
         sum += ((Employee)subordinates.elementAt(i)).getSalaries();
      }
      return sum;
   }
}