public String getRowCount() {
		String reply = null;
		try{
			Statement statement = connection.createStatement();
			ResultSet rs = statement.executeQuery("SELECT count(*) FROM orderbook;");
			if(rs!=null){
				if(rs.next()){
					reply ="orderbook contains " + rs.getString(1) + " lines.\n";
				}
			}
			rs = statement.executeQuery("SELECT count(*) FROM bid_list;");
			if(rs!=null){
				if(rs.next()){
					reply = reply + "bid_list contains " + rs.getString(1) + " lines.\n";
				}
			}
			rs = statement.executeQuery("SELECT count(*) FROM ask_list;");
			if(rs!=null){
				if(rs.next()){
					reply = reply + "ask_list contains " + rs.getString(1) + " lines.\n";
				}
			}
			rs = statement.executeQuery("SELECT count(*) FROM trade_list;");
			if(rs!=null){
				if(rs.next()){
					reply = reply + "trade_list contains " + rs.getString(1) + " lines.\n";
				}
			}
			rs.close();
			statement.close();
		}catch(Exception e){
			System.out.println("In getRowCount:  " + e);
		}
		return reply;
	}