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StockExchange.java
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StockExchange.java
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import java.util.ArrayList;
public class StockExchange {
private static ArrayList<Company> companies = new ArrayList<>();
public static void main(String[] args) {
companies.add(new Company("PYPL"));
companies.add(new Company("MSFT"));
companies.add(new Company("AMZN"));
for (Company c : companies) {
System.out.println(c);
}
rally(25);
System.out.println();
for (Company c : companies) {
System.out.println(c);
}
}
public static void rally(int percent) {
for (Company c : companies) {
Stock s = c.getStock();
s.change((int)(percent/100.0 * s.getValue()));
}
}
}
class Company {
private String name;
private Stock stock;
public Company(String companyName) {
name = companyName;
stock = new Stock((int)(Math.random()*51) + 50);
// initialize stock value to random # from 50 to 100: [50, 100]
}
public String toString() {return name + ": $" + stock.getValue();}
public Stock getStock() {return stock;}
}
class Stock {
private int value;
public Stock(int value) {this.value = value;}
public int getValue() {return value;}
public void change(int amount) {value += amount;}
}