Question

WRITE JAVA PROGRAM

Problem Statement

You are required to write a stock price simulator, which simulates a price change of a stock.

When the program runs, it should do the following:

 Create a Stock class which must include fields: name, symbol, currentPrice, nextPrice,

priceChange, and priceChangePercentage.

 The Stock class must have two constructor: a no-argument constructor and a constructor

with four parameters that correspond to the four fields.

o For the no-argument constructor, set the default value for each field such as:

 Name: Microsoft

 Symbol: MSFT

 currentPrice: 46.87

 nextPrice: 46.87

o For the argument constructor, set the value of four fields based on the arguments.

 The Stock class must have accessors and mutators for all of its fields.

 The setter methods must protect a user from setting the currentPrice/nextPrice into

negative number. You can set the values to 0 if a user tries to change them to negative

values.

 The Stock class should have a SimulatePrice() method, which increases or decreases the

currentPrice by 0 - 10% randomly, including 0.00% and 2.34%.

 The main program will ask user to enter a name, symbol, current price of a stock. Then, it

simulates the prices for next 30 days. It displays the prices for the next 30 days on the

console. If a user enters “NONE”, “NA”, 0.0 for name, symbol, current price

respectively, then the no-argument constructor is used.

Input

This program requires that you read in the following data values:

 A stock’s name, symbol, and current price.

o E.g., Microsoft Corporation, MSFT, 45.87.

You will use interactive I/O in this program. All of the input must be validated if it is needed.

You can assume that for a numeric input value, the grader will enter a numeric value in the

testing cases.

Output

Your program should display the stock’s name, symbol, current price, next price

priceChange, and priceChangePercentage for each day on the console

Answer 1

// for scanner

import java.util.*;

// Stock class

public class Stock{

    // stock name field

    private String name;

    // stock symbol field

    private String symbol;

    // stock current price

    private float currentPrice;

    // stock next price

    private float nextPrice;

    // price change between days

    private float priceChange;

    // price change in percent

    private float priceChangePercentage;

    // empty constructor

    public Stock(){

        this.name="Microsoft";

        this.symbol="MS";

        this.currentPrice=Float.valueOf("46.87");

        this.nextPrice=Float.valueOf("46.87");

    }

    // cinstructot with frist 4 fields

    public Stock(String name,String symbol,float currentPrice,float nextPrice){

        this.name=name;

        this.symbol=symbol;

        this.currentPrice=currentPrice;

        this.nextPrice=nextPrice;

    }

    // getter methods for all the fields

    public String getName(){

        return this.name;

    }

    public String getSymbol(){

        return this.symbol;

    }

    public float getCurrentPrice(){

        return this.currentPrice;

    }

    public float getNextPrice(){

        return this.nextPrice;

    }

    public float getPriceChange(){

        return this.priceChange;

    }

    public float getPriceChangePercentage(){

        return this.priceChangePercentage;

    }

    

    // setter methods

    public void setName(String name){

        this.name=name;

    }

    public void setSymbol(String symbol){

        this.symbol=symbol;

    }

    // if price passed is -ve set current price =0

    public void setCurrentPrice(float currentPrice){

        if(currentPrice<0){

            this.currentPrice=0;

        }else{

            this.currentPrice=currentPrice;

        }

    }

    // if price passed is -ve set next price =0

    public void setNextPrice(float nextPrice){

        if(nextPrice<0){

            this.nextPrice=0;

        }else{

            this.nextPrice=nextPrice;

        }

    }

    public void setPriceChange(float priceChange){

        this.priceChange=priceChange;

    }

    public void setPriceChangePercentage(float priceChangePercentage){

        this.priceChangePercentage=priceChangePercentage;

    }

    // simulatePrice function

    // returns the new price of the stock

    public float simulatePrice(){

        // initialize random nummber generator

        Random rand = new Random();

        // get a random float number between 0-1

        // divide by 10 so that it stays in range of 0-10%

        float randomPercent=rand.nextFloat()/10;

        // random number to increase of decrease current price

        int positive=rand.nextInt(2);

        if(positive!=0){

            // increase next price by randomPercent calculated

            setNextPrice(this.currentPrice+(this.currentPrice*randomPercent));

        }

        else{

             // decrease next price by randomPercent calculated

            setNextPrice(this.currentPrice-(this.currentPrice*randomPercent));

        }

        // set price change to the difference

        setPriceChange(this.nextPrice-this.currentPrice);

        // calculate and set price change percentage

        setPriceChangePercentage((this.priceChange/this.currentPrice)*100);

        // return the new price calculated

        return this.nextPrice;

    }

    // main function   

    public static void main(String[] args){

        // get stock name ,symbol and current price

        System.out.println("\t--Stock Price Simulation--");

        Scanner s=new Scanner(System.in);

        System.out.println("Enter Stock Name");

        String stockName=s.next();

        System.out.println("Enter Stock Symbol");

        String stockSymbol=s.next();

        System.out.println("Enter Current Stock Price");

        float currentStockPrice=s.nextFloat();

        Stock stock;

        // if user enters NONE ,or NA or 0.0 then

        if(stockName.equals("NONE") || stockSymbol.equals("NA") || currentStockPrice==0.0){

            stock=new Stock();

        }

        else{

            stock=new Stock(stockName,stockSymbol,currentStockPrice,currentStockPrice);

        }

        // if Stock Name set to NONE or Stock Symbol set to NA or stock current price set to 0.0

        // exit

        if(stockName.equals("NONE") || stockSymbol.equals("NA") || currentStockPrice==0.0){

            System.out.println("Stock Name set to NONE or Stock Symbol set to NA or stock current price set to 0.0");

            System.out.println("Exiting");

        }

        else{

            // loop for 30 count

            System.out.println("\t--30 Days Simulation--");

            for(int i=1;i<=30;i++){

                // get the new price

                float price=stock.simulatePrice();

                // print all the fields of the stock

                System.out.println("--Day-"+i+"--");

                System.out.println("Stock Name:"+stock.getName());

                System.out.println("Stock Symbol:"+stock.getSymbol());

                System.out.println("Stock Current Price:"+stock.getCurrentPrice());

                System.out.println("Stock Next Price:"+stock.getNextPrice());

                System.out.println("Price Change:"+stock.getPriceChange());

                System.out.println("Price Change Percentage:"+stock.getPriceChangePercentage()+"%");

                // set stock current price to new price

                stock.setCurrentPrice(price);

            }

        }

    }

}

// for scanner
import java.util.*;
// Stock class
public class Stock{
    // stock name field
    private String name;
    // stock symbol field
    private String symbol;
    // stock current price
    private float currentPrice;
    // stock next price
    private float nextPrice;
    // price change between days
    private float priceChange;
    // price change in percent
    private float priceChangePercentage;

    // empty constructor
    public Stock(){
        this.name="Microsoft";
        this.symbol="MS";
        this.currentPrice=Float.valueOf("46.87");
        this.nextPrice=Float.valueOf("46.87");
    }
    // cinstructot with frist 4 fields
    public Stock(String name,String symbol,float currentPrice,float nextPrice){
        this.name=name;
        this.symbol=symbol;
        this.currentPrice=currentPrice;
        this.nextPrice=nextPrice;
    }

    // getter methods for all the fields
    public String getName(){
        return this.name;
    }
    public String getSymbol(){
        return this.symbol;
    }
    public float getCurrentPrice(){
        return this.currentPrice;
    }
    public float getNextPrice(){
        return this.nextPrice;
    }

    public float getPriceChange(){
        return this.priceChange;
    }

    public float getPriceChangePercentage(){
        return this.priceChangePercentage;
    }
    
    // setter methods 
    public void setName(String name){
        this.name=name;
    }
    public void setSymbol(String symbol){
        this.symbol=symbol;
    }
    // if price passed is -ve set current price =0
    public void setCurrentPrice(float currentPrice){
        if(currentPrice<0){
            this.currentPrice=0;
        }else{
            this.currentPrice=currentPrice;
        }
    }
    // if price passed is -ve set next price =0
    public void setNextPrice(float nextPrice){
        if(nextPrice<0){
            this.nextPrice=0;
        }else{
            this.nextPrice=nextPrice;
        }
    }
    public void setPriceChange(float priceChange){
        this.priceChange=priceChange;
    }
    public void setPriceChangePercentage(float priceChangePercentage){
        this.priceChangePercentage=priceChangePercentage;
    }
    // simulatePrice function
    // returns the new price of the stock
    public float simulatePrice(){
        // initialize random nummber generator
        Random rand = new Random();
        // get a random float number between 0-1
        // divide by 10 so that it stays in range of 0-10%
        float randomPercent=rand.nextFloat()/10;
        // random number to increase of decrease current price
        int positive=rand.nextInt(2);
        if(positive!=0){
            // increase next price by randomPercent calculated
            setNextPrice(this.currentPrice+(this.currentPrice*randomPercent));
        }
        else{
             // decrease next price by randomPercent calculated
            setNextPrice(this.currentPrice-(this.currentPrice*randomPercent));
        }
        // set price change to the difference 
        setPriceChange(this.nextPrice-this.currentPrice);
        // calculate and set price change percentage
        setPriceChangePercentage((this.priceChange/this.currentPrice)*100);
        // return the new price calculated
        return this.nextPrice;
    }
    // main function   

    public static void main(String[] args){
        // get stock name ,symbol and current price
        System.out.println("\t--Stock Price Simulation--");
        Scanner s=new Scanner(System.in);
        System.out.println("Enter Stock Name");
        String stockName=s.next();
        System.out.println("Enter Stock Symbol");
        String stockSymbol=s.next();
        System.out.println("Enter Current Stock Price");
        float currentStockPrice=s.nextFloat();
        Stock stock;
        // if user enters NONE ,or NA or 0.0 then 
        if(stockName.equals("NONE") || stockSymbol.equals("NA") || currentStockPrice==0.0){
            stock=new Stock();
        }
        else{
            stock=new Stock(stockName,stockSymbol,currentStockPrice,currentStockPrice);
        }
        // if Stock Name set to NONE or Stock Symbol set to NA or stock current price set to 0.0
        // exit
        if(stockName.equals("NONE") || stockSymbol.equals("NA") || currentStockPrice==0.0){
            System.out.println("Stock Name set to NONE or Stock Symbol set to NA or stock current price set to 0.0");
            System.out.println("Exiting");
        }
        else{
            // loop for 30 count
            System.out.println("\t--30 Days Simulation--");
            for(int i=1;i<=30;i++){
                // get the new price 
                float price=stock.simulatePrice();
                // print all the fields of the stock
                System.out.println("--Day-"+i+"--");
                System.out.println("Stock Name:"+stock.getName());
                System.out.println("Stock Symbol:"+stock.getSymbol());
                System.out.println("Stock Current Price:"+stock.getCurrentPrice());
                System.out.println("Stock Next Price:"+stock.getNextPrice());
                System.out.println("Price Change:"+stock.getPriceChange());
                System.out.println("Price Change Percentage:"+stock.getPriceChangePercentage()+"%");
                // set stock current price to new price
                stock.setCurrentPrice(price);
            }
        }
    }
}

--Stock Price Simulation-- Enter Stock Name Microsoft Enter Stock Symbol MSFT Enter Current Stock Price 45.87 --30 Days Simulation - --Day-1-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:45.87 Stock Next Price: 41.66181 Price Change: -4.208187 Price Change Percentage: -9.17416% --Day-2-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price: 41.66181 Stock Next Price:45.78431 Price Change:4.1224976 Price Change Percentage:9.895147% --Day-3-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:45.78431 Stock Next Price:46.78652 Price Change:1.0022087 Price Change Percentage:2.1889784%

--Day-4-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price: 46.78652 Stock Next Price: 48.835407 Price Change:2.0488892 Price Change Percentage:4.37923% --Day-5-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:48.835407 Stock Next Price:49.635757 Price Change:0.8003502 Price Change Percentage:1.6388727% --Day-6-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price: 49.635757 Stock Next Price:48.633945 Price Change: -1.001812 Price Change Percentage:-2.0183272% --Day-7-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price: 48.633945 Stock Next Price:52.757065 Price Change:4.1231194 Price Change Percentage:8.477863% --Day-8-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:52.757065 Stock Next Price:47.738995 Price Change: -5.01897 Price Change Percentage: -9.511656%

--Day-9-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:34.185307 Stock Next Price:32.913002 Price Change: -1.2723845 Price Change Percentage: -3.7217877% --Day-10-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:32.913002 Stock Next Price:33.681034 Price Change:0.7680321 Price Change Percentage:2.3335218% --Day-11-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:33.681034 Stock Next Price:31.234077 Price Change: -2.4469566 Price Change Percentage:-7.265088% --Day-12-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:31.234077 Stock Next Price: 31.145916 Price Change: -0.08816147 Price Change Percentage:-0.2822605% --Day-13-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price: 31.145916 Stock Next Price:33.198723 Price Change:2.0528069 Price Change Percentage:6.5909343%

--Day-14-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:33.198723 Stock Next Price: 31.635479 Price Change: -1.5632439 Price Change Percentage: -4.708747% --Day-15-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:31.635479 Stock Next Price:32.295353 Price Change:0.65987396 Price Change Percentage:2.0858667% --Day-16-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:32.295353 Stock Next Price:31.234518 Price Change: -1.0608349 Price Change Percentage: -3.284791% --Day-17-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:31.234518 Stock Next Price:29.152693 Price Change:-2.0818253 Price Change Percentage: -6.6651425% --Day-18-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:29.152693 Stock Next Price:31.350174 Price Change:2.1974812 Price Change Percentage:7.5378327%

--Day-19- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:31.350174 Stock Next Price:31. 185534 Price Change:-0.16464043 Price Change Percentage:-0.5251659% --Day-20-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:31.185534 Stock Next Price:30.520834 Price Change: -0.66469955 Price Change Percentage:-2.1314356% --Day-21-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:30.520834 Stock Next Price:29.699696 Price Change: -0.8211384 Price Change Percentage:-2.6904192% --Day-22-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:29.699696 Stock Next Price: 30.676987 Price Change:0.9772911 Price Change Percentage: 3.2905762% --Day-23-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:30.676987 Stock Next Price:28.323288 Price Change:-2.3536987 Price Change Percentage: -7.672522%

--Day-24-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:28.323288 Stock Next Price:28.29183 Price Change:-0.0314579 Price Change Percentage: -0.11106726% --Day-25-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:28.29183 Stock Next Price:30.403505 Price Change:2.1116753 --Day-26-- Stock Name: Microsoft Stock Symbol:MSFT Stock Current Price:30.403505 Stock Next Price:29.922289 Price Change: -0.48121643 Price Change Percentage:-1.5827663% --Day-27- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:29.922289 Stock Next Price:30.392971 Price Change:0.47068214 Price Change Percentage:1.5730152% --Day-28- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:30.392971 Stock Next Price:30.106163 Price Change:-0.286808 Price Change Percentage: -0.94366556%

--Day-29- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price: 30.106163 Stock Next Price:32.36004 Price Change:2.2538757 Price Change Percentage:7.486426% --Day-30-- Stock Name:Microsoft Stock Symbol:MSFT Stock Current Price:32.36004 Stock Next Price:33. 101883 Price Change:0.7418442 Price Change Percentage:2.29247%