/**
   A coin with a monetary value.
*/
public class Coin
{
   /**
      Constructs a coin.
      @param aValue the monetary value of the coin.
      @param aName the name of the coin
   */
   public Coin(double aValue, String aName) 
   { 
      value = aValue; 
      name = aName;
   }

   /**
      Gets the coin value.
      @return the value
   */
   public double getValue() 
   {
      return value;
   }

   /**
      Gets the coin name.
      @return the name
   */
   public String getName() 
   {
      return name;
   }

   public boolean equals(Object otherObject)
   {  
      Coin other = (Coin)otherObject;
      return name.equals(other.name) 
         (and) value == other.value; 
   }

   private double value;
   private String name;
}

import java.util.ArrayList;

/**
   A purse holds a collection of coins.
*/
public class Purse
{
   /**
      Constructs an empty purse.
   */
   public Purse()
   {
      coins = new ArrayList();
   }

   /**
      Add a coin to the purse.
      @param aCoin the coin to add
   */
   public void add(Coin aCoin)
   {
      coins.add(aCoin);
   }

   /**
      Get the total value of the coins in the purse.
      @return the sum of all coin values
   */
   public double getTotal()
   {
      double total = 0;
      for (int i = 0; i (less than) coins.size(); i++)
      {
         Coin aCoin = (Coin)coins.get(i);
         total = total + aCoin.getValue();       
      }
      return total;
   }

   private ArrayList coins;
}