Assignment7_2.java - design a class named Stock that contains: A string data fie

Question

Assignment7_2.java - design a class named Stock that contains:

A string data field named symbol for the stock's symbol.

A string data field named name for the stock's name.

A double data field named previousClosingPrice that stores the stock price for the previous day.

A double data field named currentPrice that stores the stock price for the current time.

A constructor that creates a stock with specified symbol and name.

A method named getChangePercent() that returns the percentage change from previousClosingPrice to currentPrice.

Implement the class. Write a test program that creates a Stock object with the stock symbol JAVA, the name Sun Microsystems Inc. and the previous closing price of 4.5. Set a new current price to 4.35 and display the price-change percentage.

Explanation / Answer

import java.util.Scanner;


public class StockTest {
   public static void main(String[] args) throws Exception{

       Stock st = new Stock("JAVA", "Sun Microsystems");
       st.setPreviousClosingPrice(4.5);
       st.setCurrentPrice(4.35);
      
       double pchange = st.getChangePercent();
       System.out.println("Symbol: "+st.getSymbol()+" Name: "+st.getName());
       System.out.println("previous closing price : "+st.getPreviousClosingPrice()
               +" current price: "+ st.getCurrentPrice()
               +" change (%) : "+pchange);
   }
}


class Stock {
   private String symbol;
   private String name;
   private double previousClosingPrice;
   private double currentPrice;
  
   public Stock(String symbol, String name) {
       this.symbol = symbol;
       this.name = name;
       previousClosingPrice = 0;
       currentPrice = 0;
   }
  
   public double getChangePercent() {
       double changePercent = 0;
      
       if(previousClosingPrice != 0) {
           double change = (currentPrice-previousClosingPrice) ;
           changePercent = (change * 100)/ previousClosingPrice;
          
       }
       return changePercent;
   }
  
   public String getSymbol() {
       return symbol;
   }
   public void setSymbol(String symbol) {
       this.symbol = symbol;
   }
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
   public double getPreviousClosingPrice() {
       return previousClosingPrice;
   }
   public void setPreviousClosingPrice(double previousClosingPrice) {
       this.previousClosingPrice = previousClosingPrice;
   }
   public double getCurrentPrice() {
       return currentPrice;
   }
   public void setCurrentPrice(double currentPrice) {
       this.currentPrice = currentPrice;
   }
  
  
}

--------------output-----------------

Symbol: JAVA Name: Sun Microsystems
previous closing price : 4.5 current price: 4.35 change (%) : -3.333333333333341

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