@Override
    public boolean equals(Object obj){
        IQuote quote= (IQuote) obj;
        if ((symbol.equals(quote.getSymbol()))&&(date.equals(quote.getDate()))&&(openPrice.equals(quote.getOpenPrice()))&&(highPrice.equals(quote.getHighPrice()))
                &&(lowPrice.equals(quote.getLowPrice()))&&(closePrice.equals(quote.getClosePrice()))){
         return true;
        }
        else
            return false;
    }