import java.util.Hashtable;              // Java lookup mechanism based on key

public class Stock {
  public String SYM;                     // primary key
  public double PRICE;                   // public visiblity: same as record struct
  public Heap buyheap = new Heap(true);
  public Heap sellheap = new Heap(false);
  public static Hashtable stocks = new Hashtable();  // find stock keyed on SYM
                                                     // static: just one hashtable
  public Stock(String SYM, double PRICE) {
    this.SYM = SYM; this.PRICE = PRICE;
    stocks.put(SYM,this);                // put itself into the hastable using primary key
  }
  public String toString() {
    return (SYM + " " + PRICE);
  }
}