test6.java

import java.util.Scanner;
import java.util.Stack;

import javax.swing.JOptionPane;

public class test6 {
	
	static Stack myStack = new Stack ();
	static Scanner in = new Scanner(System.in) ;

	public static void main(String[] args) {

		String myStockName = null ;
		int numNeeded = 0 ;
		int menuSelection = 0 ;
		int myStockNum = 0 ;
		double myStockPrice = 0 ;
		Stock myStock = null ;

		populateStack();
		
		while(menuSelection != 4)
		{
		System.out.println("Welcome to the Stock-Trading Menu!");
		System.out.println("Press 1 to enter a new stock");
		System.out.println("Press 2 to find the FIFO and LIFO price for a stock");
		System.out.println("Press 3 to display all stocks");
		System.out.println("Press 4 to quit");
		
		menuSelection = inputGuard(1,4);
		
		if (menuSelection ==1)
		{
			System.out.println("You have chosen to add new stock");
			myStockName = chooseStock();
			System.out.println("Stock selected was " + myStockName);
			System.out.println("Enter the number of stocks you want to add");
			myStockNum = inputInteger();
			System.out.println("Enter the individual price of the stocks you want to add");
			myStockPrice = inputDouble();
			myStack.push(new Stock(myStockName,myStockNum,myStockPrice) );
			System.out.println();
		}
		else if (menuSelection == 2)
		{
			System.out.println("You have chosen to find the FIFO and LIFO price for a stock");
			myStockName = chooseStock();
			System.out.println("Stock selected was " + myStockName);
			System.out.println("Enter number of shares");
			numNeeded = inputInteger();
			doFIFOCost(numNeeded,myStockName);
			doLIFOCost(numNeeded,myStockName);
			System.out.println();
		}
		else if (menuSelection ==3)
		{
			System.out.println("You have chosen to display all stocks");
			int size = myStack.size();
			System.out.println();
			System.out.printf("%-20s %-20s %-20s \n", "Stock Name" , "Number of Shares", "Purchase Price");
			System.out.println("--------------------------------------------------------");
			for (int i=0 ; i < size ; i++)
			{
				myStock = (Stock) myStack.get(i);
				System.out.printf("%-20s %-20d %-18.2f \n", myStock.getName(), myStock.getNumberShares(), myStock.getPrice());
			}
			System.out.println();
		}
		else
		{
			System.out.println("Bye!");
			break;
		}
	}
}
	
public static void doFIFOCost(int numStocksNeeded, String StockName)
{
	int i = 0 ;
	int numNeeded = numStocksNeeded ;
	String myStockName = StockName ;
	int numStocks = myStack.size();
	Stock myStock = null ;
	double myPrice ;
	int stocksAvail = 0 ;
	double stockValueSum = 0 ;
	int numStocksAdded = 0 ;
	double FIFOCost = 0 ;
	
	while (numNeeded !=0 & (i < numStocks))
	{
		myStock = (Stock) myStack.get(i) ;
		if (myStock.getName().equalsIgnoreCase(myStockName))//if1
		{
			stocksAvail = myStock.getNumberShares();
			myPrice = myStock.getPrice();
			if (stocksAvail >= numNeeded)//if2
			{
				stockValueSum += numNeeded*myPrice ;
				numStocksAdded += numNeeded ;
				numNeeded = 0 ;
			}//end if2
			else
			{
				stockValueSum += stocksAvail*myPrice ;
				numNeeded -= stocksAvail ;
				numStocksAdded += stocksAvail ;
			}
		}//end if1
		i++ ;		
	}//end of while
	FIFOCost = stockValueSum/(double) numStocksAdded ;

	if (numStocksAdded < numNeeded)
	System.out.printf("There were only %10d %12s stocks available. The FIFO cost is %10f",numStocksAdded,myStockName,FIFOCost);
	else
	System.out.printf("The FIFO cost of %10d %12s stocks is %10.2f ", numStocksAdded,myStockName,FIFOCost);
	System.out.println();
}


public static void doLIFOCost(int numStocksNeeded, String StockName)
{
	
	int numStocks = myStack.size();
	int i = numStocks - 1 ;
	int numNeeded = numStocksNeeded ;
	String myStockName = StockName ;
	Stock myStock = null ;
	double myPrice ;
	int stocksAvail = 0 ;
	double stockValueSum = 0 ;
	int numStocksAdded = 0 ;
	double LIFOCost = 0 ;
	
	while (numNeeded !=0 & (i >= 0))
	{
		myStock = (Stock) myStack.get(i) ;
		if (myStock.getName().equalsIgnoreCase(myStockName))//if1
		{
			stocksAvail = myStock.getNumberShares();
			myPrice = myStock.getPrice();
			if (stocksAvail >= numNeeded)//if2
			{
				stockValueSum += numNeeded*myPrice ;
				numStocksAdded += numNeeded ;
				numNeeded = 0 ;
			}//end if2
			else
			{
				stockValueSum += stocksAvail*myPrice ;
				numNeeded -= stocksAvail ;
				numStocksAdded += stocksAvail ;
			}
		}//end if1
		i-- ;		
	}//end of while
	LIFOCost = stockValueSum/(double) numStocksAdded ;

	if (numStocksAdded < numNeeded)
	System.out.printf("There were only %10d %12s stocks available. The LIFO cost is %10f",numStocksAdded,myStockName,LIFOCost);
	else
	System.out.printf("The LIFO cost of %10d %12s stocks is %10.2f ", numStocksAdded,myStockName,LIFOCost);
	System.out.println();

	}

public static void populateStack()
{
	
	Stock Google1 = new Stock("Google", 20, 25);
	Stock Google2 = new Stock("Google", 10, 40);
	Stock Google3 = new Stock("Google", 15, 50);
	Stock Apple1 = new Stock("Apple", 40, 10);
	Stock Apple2 = new Stock("Apple", 30, 50);
	Stock IBM1 = new Stock("IBM", 36, 20);
	Stock IBM2 = new Stock("IBM", 30, 40);
	Stock Intel1 = new Stock("Intel", 26, 70);
	Stock Intel2 = new Stock("Intel", 38, 58);
	Stock Google4 = new Stock("Google", 30, 80);
	
	//Load myStack
	myStack.push(Google1);
	myStack.push(Google2);
	myStack.push(Google3);
	myStack.push(Apple1);
	myStack.push(Apple2);
	myStack.push(IBM1);
	myStack.push(IBM2);
	myStack.push(Intel1);
	myStack.push(Intel2);
	myStack.push(Google4);

	
}

public static String chooseStock()
{
int selection = 0 ;
String stockName = null ;
System.out.println("Press 1 to select Google stock");
System.out.println("Press 2 to select Apple stock");
System.out.println("Press 3 to select Facebook stock");
System.out.println("Press 4 to select Intel stock");
selection = inputGuard(1,4);

switch (selection){
case 1 : {
	stockName = "Google";
	break ;
}
case 2 : {
	stockName = "Apple";
	break;
}
case 3 : {
	stockName = "Facebook";
	break;
}
case 4 : {
	stockName = "Intel";
	break ;
	}
}//end of switch
return stockName ;
}

public static int inputGuard ( int lower, int upper)
{
	int selection = 0 ;
	boolean notHappy = true ;
	int myLower = lower ;
	int myUpper = upper ;
	
	while (notHappy){
		if (!(in.hasNextInt())){
			JOptionPane.showMessageDialog(null, "You did not enter an integer");
			in.nextLine();
		}// end first if
		else {
			selection = in.nextInt();
			if (!(((selection<=myUpper)&(selection>=myLower)))) {
				JOptionPane.showMessageDialog(null, "The integer you entered is not from the menu");
				in.nextLine();
			}//end second if
			else {
				notHappy = false ;
				in.nextLine();
			}//end second else
		}//end first else
	}//end while
	notHappy = true ;
	
	return selection ;
}

public static int inputInteger()
{
	int inputInt = 0 ;
	while (!(in.hasNextInt()))
	{
		JOptionPane.showMessageDialog(null, "You did not enter an integer");
		in.nextLine();
	}
	inputInt = in.nextInt();
	in.nextLine();
	return inputInt ;
}

public static double inputDouble()
{
	double inputDouble = 0 ;
	while (!(in.hasNextDouble()))
	{
		JOptionPane.showMessageDialog(null, "You did not enter a double");
		in.nextLine();
	}
	inputDouble = in.nextInt();
	in.nextLine();
	return inputDouble ;
}







}