CaseClass.java

/* 
Code for 
case class Trade(symbol: String, exchange: String, qty: Int, price: Double)
*/
public class Trade implements Product, Serializable
{
  private final String symbol;
  public double price(){
    return this.price;
  }
  public int qty(){
    return this.qty;
  }
  public String exchange(){
    return this.exchange;
  }
  public String symbol(){
    return this.symbol;
  }
  
}