Answered: Given the following code in Java and…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Question

Given the following code in Java and attached images( containing related code):

//Controller (ONLY EDIT THE Controller.java file)

import java.util.LinkedList;

import java.util.Scanner;

public class Controller {

public Controller() {

LinkedList<Stock> googList = new LinkedList<Stock>();

LinkedList<Stock> amazList = new LinkedList<Stock>();

Scanner input = new Scanner(System.in);

do {

System.out.print("Enter 1 for Google stock or 2 for Amazon, 3 to quit: ");

int stockSelect = input.nextInt();

if(stockSelect == 3)

break;

System.out.print("Input 1 to buy, 2 to sell: ");

int controlNum = input.nextInt();

System.out.print("How many stocks: ");

int quantity = input.nextInt();

if(controlNum == 1) {

System.out.print("At what price: ");

double price = input.nextDouble();

if(stockSelect == 1) {

Controller.buyStock(googList, "Google", quantity, price);

}

else

Controller.buyStock(amazList, "Amazon", quantity, price);

}

else {

System.out.print("Press 1 for LIFO accounting, 2 for FIFO accounting: ");

controlNum = input.nextInt();

if(controlNum == 1) {

if(stockSelect == 1)

Controller.sellLIFO(googList, quantity);

else

Controller.sellLIFO(amazList, quantity);

}

else {

if(stockSelect == 1)

Controller.sellFIFO(googList, quantity);

else

Controller.sellFIFO(amazList, quantity);

}

} while(true);

input.close();

}

public static void buyStock(LinkedList<Stock> list, String name, int quantity, double price) {

Stock temp = new Stock(name,quantity,price);

list.push(temp);

System.out.printf("You bought %d shares of %s stock at $%.2f per share %n", quantity, name, price);

}

public static void sellLIFO(LinkedList<Stock> list, int numToSell) {

// You need to write the code to sell the stock using the LIFO method (Stack)

// You also need to calculate the profit/loss on the sale

double total = 0; // this variable will store the total after the sale

double profit = 0; // the price paid minus the sale price, negative # means a loss

System.out.printf("You sold %d shares of %s stock at %.2f per share %n", numToSell, list.element().getName(), total/numToSell);

System.out.printf("You made $%.2f on the sale %n", profit);

}

public static void sellFIFO(LinkedList<Stock> list, int numToSell) {

// You need to write the code to sell the stock using the FIFO method (Queue)

// You also need to calculate the profit/loss on the sale

double total = 0; // this variable will store the total after the sale

double profit = 0; // the price paid minus the sale price, negative # means a loss

System.out.printf("You sold %d shares of %s stock at %.2f per share %n", numToSell, list.element().getName(), total/numToSell);

System.out.printf("You made $%.2f on the sale %n", profit);

}

//Driver

public class Driver {

public static void main(String[] args) {

System.out.println("Java Stock Exchange");

new Controller();

}

//Images attached are in order with following code

//Stock

public Stock(int quantity, double price) {

this.name = "undefined";

this.quantity = quantity;

this.price = price;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getQuantity() {

return quantity;

}

public void setQuantity(int quantity) {

this.quantity = quantity;

}

public double getPrice() {

return price;

}

public void setPrice(double price) {

this.price = price;

}

public String toString() {

return "Stock: " + this.getName() + " Quantity: " + this.getQuantity() + " Price: " + this.getPrice();

}

Implement the following:

1. Add the missing functionality in “controller.java” to finish the
“sellLIFO” and “sellFIFO” methods.

2. Provide error checking so users can’t sell a stock they don’t own or
try to sell more stock than they own. Eliminate that runtime exception.

3. We think its sort of limited to only work with just two stocks. You
need to change the user input, so the user enters the stock name they
wish to buy or sell instead of just choosing between Google and
Amazon. Keep the command line interface since we are only in the
testing phase.

4. We like the layout and design of the application so don’t change any
of the other methods or objects. Only edit the Controller.java file!

5
600 0 HN 3 4 5 6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
12345678
22
public class Stock {
private String name;
private int quantity;
private double price;
public Stock() {
}
public Stock (String name, int quantity, double price) {
this.name = name;
this.quantity = quantity;
this.price = price;
}
this.name = "undefined";
this.quantity = 0;
this.price = 0.0;
public Stock (String name) {
this.name = name;
this.quantity = 0;
this.price = 0.0;
}

29
30
31
32
33
34
35
36
37
38
39
` 48 4 2 3 4 5 46 47 48
40
41
42
43
44
49
50
51
52
public Stock(int quantity) {
this.name = "undefined";
this.quantity = quantity;
this.price = 0.0;
}
public Stock (double price) {
this.name = "undefined";
}
public Stock (String name, int quantity) {
this.name = name;
this.quantity = quantity;
this.price = 0.0;
}
this.quantity = 0;
this.price = price;
public Stock(String name, double price) {
}
this.name = name;
this.quantity = 0;
this.price = price;

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 6 steps with 6 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.