9.2 (The Stock class) Following the example of the Circle class in Section 9.2,
design a class named Stock that contains:
Draw the UML diagram for the class and then implement the class. Write a test
program that creates a Stock object with the stock symbol ORCL , the name
Oracle Corporation , and the previous closing price of 34.5 . Set a new current
price to 34.35 and display the price-change percentage
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 the specified symbol and name.
- A method named getChangePercent() that returns the percentage changed from previousClosingPrice to currentPrice .
Draw the UML diagram for the class and then implement the class. Write a test
program that creates a Stock object with the stock symbol ORCL , the name
Oracle Corporation , and the previous closing price of 34.5 . Set a new current
price to 34.35 and display the price-change percentage
public 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; } 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 getCurrentPrice() { return currentPrice; } public void setCurrentPrice(double currentPrice) { this.previousClosingPrice = this.currentPrice; this.currentPrice = currentPrice; } public double getPreviousClosingPrice() { return previousClosingPrice; } public void setPreviousClosingPrice(double previousClosingPrice) { this.previousClosingPrice = previousClosingPrice; } public double getChangePercent() { return (currentPrice - previousClosingPrice) / previousClosingPrice; } }
public class Exercise_02 { public static void main(String[] args) { Stock stock1 = new Stock("ORCL", "Oracle Corporation"); stock1.setCurrentPrice(34.5); stock1.setCurrentPrice(34.35); System.out.println("Stock name: " + stock1.getName() + " Symbol: " + stock1.getSymbol()); System.out.println("previous price: " + stock1.getPreviousClosingPrice()); System.out.println("current price: " + stock1.getCurrentPrice()); System.out.println("Percent changed: " + stock1.getChangePercent()); } }
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