public void updateDisplay() {
		this.wasAccepted = false;
		this.stock = null;
		this.lstStocks.setListData(this.stocks.toArray());
		this.txfDate.setText(Service.dateToString(new Date(System
				.currentTimeMillis())));
		if (this.requiresStock) {
			this.btnOk.setEnabled(false);
		}
		else this.btnOk.setEnabled(true);
	}