Regarding Assignment Two and Having Random Stock Selected/Bought

[Jetrujillo]

Hey professor,
I was working on this code and I'm stuck between a rock and a hard place. For the life of me, I cannot figure out how to do this. I have a method labeled "buyRandomStock(Agent a)". I'll link the file of the entire class. Any advice will be helpful, thank you.
What I want to accomplish:
-have a method with randomly generated purchase amounts used to create a certain amount of stocks to purchase
-then use that purchase amount method with another method to create an allocated amount for each stock by dividing the budget equally
-then use the allocated amount and divide that by the stock price of each selected stock to come up with amount of that stock bought
-I then want to be able to use that data and put it in the portfolio and use it as like receipts for different agents (for example, when i print it, i want it to be something like "System.out.println("Agent : ABCD purchased Stocks:..."). You get the idea. Thank you for your time.

Best,
Justin Trujillo

---

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Portfolio {
ArrayList portfolio = new ArrayList();
ArrayList index = new ArrayList();
ArrayList agentIndex = new ArrayList();

/**
 * 
 * RECORD OF PURCHASES OF STOCK
 */
public Portfolio() 
{


}

private void buyRandomStock(Agent a)
{
 Random r = new Random();
 double x = (a.createRandomPurchaseAmount());
    for(int i = 1; i <=x; i++)
    {
        Stock l = index.get(r.nextInt(6000 - 1) + 1);
        double stockPrice = l.getPrice();
        double NumberOfStocksBought = (a.createAllocationAmount() / stockPrice);
        portfolio.addAll(NumberOfStocksBought); //Stuck here
    }
}

public void addStockToPortfolio(Transaction t)
{
    portfolio.add(t);
}

/**
 * 
 * print the portfolio
 */
public void printPortfolio()
{
//  System.out.println(Arrays.toString(portfolio));

    for (int i = 0; i < portfolio.size(); i++)
        System.out.println("\nThis is the ID of your transaction: " + portfolio.get(i));            
}

//public void transactionInfo(String l, ArrayList<Stock> index)
//{
//  Transaction t = new Transaction();
//  for(Stock s : index)
//      System.out.println("\nUser has purchased stock: " + s.getSymbol() +
//                          "\n Quantity: " + t.getNumberBought() +
//                          "\nTotal Price: " + "\n\nThank you for your purchase.");
//}

public List<Transaction> getAll() 
{
    return new ArrayList<Transaction>(portfolio);
}

}

[stefanbund]

Let me be the first to wade into this one. First question, why do you plan to send an agent to this function? Perhaps this function should be inside the agent class, and you use a void function which inserts transactions into a portfolio held by that agent.

I intend to return to this post, it is really good and I'm glad you created it.

Another tool at your disposal is the transaction class. Recall that the transaction class helps you capture stock information such as price and symbol. Then, it adds the additional variable of amount, reflecting the number of shares you purchased. Once you create a transaction, you should add it to an array list, representing the portfolio.

Next class I plan to go over the array list a little bit. I plan to start from scratch, just creating an array list, then getting elements from it. That should give you some inspiration on how to get a stock from the broader market index.

Since you have an impressive amount of work done already, it might benefit you to take a quick detour. Create a new project, with no classes. Create an array list, then add some stuff to it. A string will do. Then experiment with the get feature of the array list. This will show you how to grab something from an array list. This will serve as a good example of how to do it with the larger Application you are building right now.

From Stefan

On Nov 4, 2015, at 1:50 AM, Jetrujillo notifications@github.com wrote:

Hey professor,
I was working on this code and I'm stuck between a rock and a hard place. For the life of me, I cannot figure out how to do this. I have a method labeled "buyRandomStock(Agent a)". I'll link the file of the entire class. Any advice will be helpful, thank you.
What I want to accomplish:
-have a method with randomly generated purchase amounts used to create a certain amount of stocks to purchase
-then use that purchase amount method with another method to create an allocated amount for each stock by dividing the budget equally
-then use the allocated amount and divide that by the stock price of each selected stock to come up with amount of that stock bought
-I then want to be able to use that data and put it in the portfolio and use it as like receipts for different agents (for example, when i print it, i want it to be something like "System.out.println("Agent : ABCD purchased Stocks:..."). You get the idea. Thank you for your time.

Best,
Justin Trujillo

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Portfolio {
ArrayList portfolio = new ArrayList();
ArrayList index = new ArrayList();
ArrayList agentIndex = new ArrayList();

/**

• RECORD OF PURCHASES OF STOCK
  */
  public Portfolio()
  {

}

private void buyRandomStock(Agent a)
{
Random r = new Random();
double x = (a.createRandomPurchaseAmount());
for(int i = 1; i <=x; i++)
{
Stock l = index.get(r.nextInt(6000 - 1) + 1);
double stockPrice = l.getPrice();
double NumberOfStocksBought = (a.createAllocationAmount() / stockPrice);
portfolio.addAll(NumberOfStocksBought); //Stuck here
}
}

public void addStockToPortfolio(Transaction t)
{
portfolio.add(t);
}

/**

• print the portfolio
  */
  public void printPortfolio()
  {
  // System.out.println(Arrays.toString(portfolio));

  for (int i = 0; i < portfolio.size(); i++)
  System.out.println("\nThis is the ID of your transaction: " + portfolio.get(i));
  }

//public void transactionInfo(String l, ArrayList index)
//{
// Transaction t = new Transaction();
// for(Stock s : index)
// System.out.println("\nUser has purchased stock: " + s.getSymbol() +
// "\n Quantity: " + t.getNumberBought() +
// "\nTotal Price: " + "\n\nThank you for your purchase.");
//}

public List getAll()
{
return new ArrayList(portfolio);
}
}

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