public class TradingFool implements Observer
	{
	private String symbol;
	private float close;

	public TradingFool(StockData stockData)
		{
		stockData.attach(this);
		}

	public void update(String symbol,float close,float high,float low,long volume)
		{
		this.symbol = symbol;
		this.close = close;
		display();
		}

	public void display()
		{
		DecimalFormatSymbols dfs = new DecimalFormatSymbols();
		DecimalFormat priceFormat = new DecimalFormat("###.00",dfs);
		System.out.println("Trading Fool says... ");
		System.out.println("\t" + symbol + " is currently trading at $" +
            	priceFormat.format(close) + " per share.");
		System.out.println();
		}
	}

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